Is it seriously only -13? If they don't have meter just fuckin DO IT, man. There really isn't shit that's gonna punish you, is deathfist even that fast anymore? Oh btw Prep 4 does exactly what it needs to do, and that's avoid 2A's. So if they think they're gonna 2A you out of it, you've got an option. I have yet to find anything that makes Prep less dangerous, tbh. He's got every option he needs out of that combined with SE, it seems.
How much time does it take for a Prep~SE~attack transition to come out? Looks like the opp will simply be able to do a 2A or 2K on reaction and stuff whatever Raph was going to do.