So, this is the first build I've ever posted. I mostly follow other people's builds. This is based heavily on a "Rogue Leveling Build" from pre-BUE, tweaked somewhat to taste.
Goals of this build are:
Be easy: A lot of Rogue builds I've seen require powers from Limbo bosses. Since that event is still a week or so away, This build focuses on powers Rogue players should easily be able to pick up by loitering in Avengers tower and "bad touch"ing anyone and everyone they see. The rotation is also simple and minimal, you don't really need to keep an eye on a lot of cooldowns or resources.
Disclaimer: There is one part of the build that does take some resource investment, to the tune of 2,150 Cosmic Worldstones. But it's worth it.
Be effective: I'm not a huge theorycrafter, numbercruncher, spreadsheetmaker, or min-maxer, but I do want my Heroes to not die. This Rogue build handles Heroic content very easily, I make no promises about Cosmic (I've only passed the Cosmic Trial on one character, Scarlet Witch).
Be fun: "Fun," to me, is being able to play well and easily. I don't want to feel like I'm learning a completely new game every time I switch heroes, and some heroes just aren't to my taste. Rogue can be built almost any way you like, so this build focuses on things I (generally) like my heroes to be able to do, while neglecting things I don't particularly care if they can do. I also like to switch heroes a lot, so I like to be able to pick up a hero, play them for a little bit, and then swap to somebody else if the mood strikes me. I can hop on this Rogue, run a terminal or two, then hop to Spider-Man, or Scarlet Witch, or Captain Marvel, without the buttons I'm hitting doing things I don't want (usually).
So, with all that out of the way, here's the build:
Powers:
Bone Claws (Wolverine): Bound to Left Mouse Button, your basic attack. Yes, I use a basic in this build, don't judge me. My Rogue does sometimes run into spirit issues, so this can be a lifesaver, and with its Life On Hit, it can be a literal lifesaver, letting you heal up while still getting some DPS in. That having been said, it is a Basic attack, so it's pretty lackluster all around. Still, when you've got nothing else, it's fun to shred things with Wolverine Claws.
Crimson Sweep (X-23): No, this isn't an "I want to be Wolverine so bad I can taste it" build. This is just the best power I could find that fit the criteria I wanted: Namely, a spammable spender attack that does Physical damage. It's an area attack, so it's not the boss-killer that, say, Solar Strike (Sunspot) is, but it does do Physical damage, hits an area (which is both good and bad), has bleed and vulnerability, and is pretty quick and cheap to boot. If you have another Physical spender you'd like to use instead, hey, I ain't gonna come to your house and tell you you're doing it wrong.
Magnetic Attraction (Magneto): This is one-half your bread-and-butter Area combo. Does solid damage, pulls in enemies, deals Energy damage.
Flames Of The Faltine (Clea): The other half of your bread-and-butter Area combo (which, I guess, would make it "butter"). Good Mental damage over time, great after you've grouped up all the enemies with Magnetic Attraction. Dropping this one-two punch should clear most trash, and take a significant chunk out of blues and yellows. Popping them both as their cooldowns expire will keep Bosses feeling the pain, and keep your Gear procs up.
Ragin' Cajun (Gambit): Hands down Rogue's best Stolen power (since, near as I can tell, it shows up in every single build she has). Pop it when you need the extra damage.
Gloves Off: Similar to Ragin' Cajun, pop this when you need extra damage/health on hit.
Drain Life/Recall Overload: With Rogue's new Power Library, keep Drain Life slotted on your bar until you've got all the powers. You'll probably never use most of them, but still, gotta catch 'em all! Once your done stealing powers, slot in Recall Overload. . . or not.
Kree Charge: Yadda yadda dash yadda yadda crowd control yadda yadda.
Rotation is pretty basic: Hit Magnetic Attraction, drop a Flames of the Faltine, and if anything's still standing, hold down Crimson Sweep until it isn't/you run out of Spirit (then switch to Bone Claws until you've rebuild your Spirit)/cooldowns on Magnetic Attraction and Flames of the Faltine refresh. Toss on Ragin' Cajun and/or Gloves Off if you need to spike your damage. Dash out of trouble. Steal powers you don't have.
Traits
Spider-Sense (Spider-Man, Spider-Gwen): Both Spider-Man and Spider-Gwen's stolen passives are exactly the same, so use whichever. You can see enemies on the minimap, get dodge rating, and more damage based on your Dodge to Core powers (and a few of Rogue's regular powers. . . but seriously, who uses those?)
Mutagenic Durability (Tombstone): Some health, some health regen, and adds Guarded. Half of making Rogue super-tanky.
Lizard Serum (Lizard): The other half of making Rogue super-tanky. More Health and Spirit regen than frelling Deadpool. With this, life-on-hit from a few sources, and Rogue's Durability, you have no excuse for dying. Really, none at all. Don't care if Juggernaut just tap-danced on your forehead, walk it off.
Rogue's Talents
Rogue only has three talents, she can slot three stolen passive traits from other characters.
First Tier: I went with Psionic Recall, but. . . well, really, it probably doesn't matter.
Second Tier: Mimetic Mutation. Adds damage and reduces Spirit costs of Stolen powers, which, since those are the only ones we're using. . . yes?
Drain Dry: Honestly, I'm thinking Rogue's Drain powers are going to be better than her Sig anyway, so why not buff them?
Infinity System
Space: The final frontier. These are. . . oops, wrong game. Here, obviously, you want Durability. Not-so-obviously, you also want Co-Location, which increases your Dodge rating. Why? Well, you've got that Spider-Sense, put it to good use! The better your Dodge, the more damage you'll do.
Time: You know, if the Space Gem came after the Time Gem, there'd be a killer Doctor Who joke in here somewhere. Anyway, Bone Claws is already pretty fast, but you can put some points in Temporal Loophole if you want. I have most of mine in Haste, for lack of anything more attractive. But bumping Speed itself could be fun if nothing else trips your trigger (all about that Dodge rating, baby.)
Mind: Now here, we're almost spoilt for choice. Mind Over Matter is great for reinforcing the already-robust health we're getting off Bone Claws and Lizard Serum, but for those who want more time spending, Deep Thought and Calculated Efficiency are good choices. Honestly, I'd max all three if I had the points.
Power: Indomitable, keeping up with our "Rogue is tanky" theme. Or Potency, if you like her Sig.
Reality: Inner Resilience (More life-on-hit), Tilt The Odds and Magic Bullet. Depending on if you want more tankiness, more DPS, or a balance.
Soul: Fighting ('coz Rogue's all fighty like that), God Among Insects, Strike True, and/or Strike Through. Again, depending on where you want to fall in the tanky/bruty scale.
Synergies
Captain Marvel: Buff that Energy Damage.
Dr. Strange: Buff that Mental Damage.
Emma Frost: With this build, Rogue as two damage-over-time powers, but the real win here is +1 Durability.
Ghost Rider: Buff that Mental Damage.
Jean Grey: Buff that Mental and Energy Damage.
Luke Cage: Defense (fitting Rogue's Archetype) and Physical Damage.
Rogue: Health and Spirit on hit.
She-Hulk: Physical Damage and Health Regen for. . . well, you know.
Spider-Man: More Dodge.
Thor: Buff that Physical and Energy Damage.
Gear
I'm lazy (and underfunded), so I usually just use a hero's specific Uniques in Slot 1-5.
For a Catalyst, if you can find with with bonuses to Physical, Mental, and Energy damage, then you're good. Otherwise, my favorite affixes tend to be Life-On-Hit, Regen 25% with Medkit, and the Damage Shield Cosmic bonus.
For an Insignia, I'm using an Insignia of Cyclops for the team buff effects, with Critical and Brutal Rating.
For a pet, you want the +3 Durability or Fighting bonus. The rest is pretty standard from hero to hero, +health, +spirit, and so on.
For a Legendary, I'm using. . . drumroll please. . . yeppers, The Power Cosmic. Since this build hits all three damage types, you can get great buffs off this handy little device. If you can't nab a Power Cosmic (Moonstone's still there, you know) you can put any other decent Legendary on her until the next Cosmic Chaos event rolls around.
For Relics, I use Atlantis on Rogue, though you could go for Lemuria or Subterrena if you want more tankiness.
Artifacts are. . . well, I need to do some work on that after the BUE. I'd go with an Advanced Crimson Circlet of Cyttorak for the Durability (replace/supplement with a White Suit Jacket if you've got it), Doop Ectoplasm (again, proccing off those three damage types), and a Spider-Clone Serum (for the Fighting). Last slot I'd add something to boost Mental or Energy damage, as you see fit, or more for Rogue's primary stats. For Blessings, I run two Hela and two Fandral (for that sweet, sweet Dodge rating). Doop Ectoplasm is also available from Moonstone, for 500 Cosmic Worldstones.
For a Medallion, I'm using a Cosmic Skrull Imposter Nick Fury Medallion. Juggernaut's a solid choice for more Durability.
Uru-Forged is a War Plate, with, of course, The Power Doop. Keep the Energy/Mental/Physical damage rotation of your powers up, and you'll be getting mad buffs from this, Doop Ectoplasm, and The Power Cosmic. The Power Doop recipe is available from Moonstone for 400 Cosmic Worldstones, and you can buy Doop Runes (needed to actually add the Runeword) for 500 Worldstones.
For lack of anything else that really jumped out at me, I'm using a Bloodstone Demonband with +250 damage on melee powers, Regen 63 Health when you defeat a demon, +1 Energy, Strength, and Durability, and 11.6 Summoned Ally Duration. Really, you kinda can't go wrong with a ring for Rogue, since it'll buff at least one of the kinds of damage she dishes out. My preference would be for Physical or Melee damage, since that's your spam attack, but whatever stats you think you need more of after running her a bit, look for a ring to help out.
Well, that's pretty much it. Hopefully this helps get some Rogue players (especially newer ones) on their feet.