BlinkIV
Avenger
Yep, the weak hit of U-Air will always hit them directly above you, which is amazing to abuse against floaty's/Ness (If he D-airs you, or tries to D-air offstage, weak U-air always wins), while strong U-Air won't beat it, it's weird, I know. I can get a video of that here in a few hours, probably showing the differences between the U-airs, and the weak u-air to Up-B kill.
Stages can matter against Peach, I'd play passive-agressive on Metal Cavern or WarioWare, F-Smash/Tilt kills relatively early, you can kill her off the top with ease as well, and she doesn't have much space to run, and your U-Smash goes through plats (Welcome to PitWare Inc?). I can't offer too much insight on Tlink, since I haven't played any notable ones or good ones at that. ROB though! I play with Oracle almost every week, stage-wise, I don't think there's any stage that really makes it more in Pit's favor, almost every stage benefit both ROB and Pit in the same ways. I say just go with whatever you feel with work.
Stages can matter against Peach, I'd play passive-agressive on Metal Cavern or WarioWare, F-Smash/Tilt kills relatively early, you can kill her off the top with ease as well, and she doesn't have much space to run, and your U-Smash goes through plats (Welcome to PitWare Inc?). I can't offer too much insight on Tlink, since I haven't played any notable ones or good ones at that. ROB though! I play with Oracle almost every week, stage-wise, I don't think there's any stage that really makes it more in Pit's favor, almost every stage benefit both ROB and Pit in the same ways. I say just go with whatever you feel with work.