There were a couple interesting things I noticed with Reptile today. I figured this thread is the best place to share. (Sorry if any of this is old info)
Reptile's 2f3,1+2 reset is extremely punishable unless you dash to cancel the recovery frames. Also, the last hit (1+2) occassionally whiffs, in which case you can't dash cancel the recovery frames and can be punished hard by a wake up attack. For consistency, I'm now using f3,1+2 without the first hit so that the last hit will never whiff.
Ending a combo with 32~elbow dash, cross-over jump punch is a really nice setup. It confuses the opponent's direction to wake up and beats a lot of wake up attacks. If the opponent tech rolls, you just end up doing a jump-in-punch rather than a cross-over jump punch. Once the opponent respects this setup, you can jip into a free throw.
Invisibility is the best bait in the game. I know this has been mentioned a lot, but I want to say it again lol. Against characters like Raiden, I'll even throw out invisibility at random to bait his superman/teleport.