91% Hypno Confusion/Psyshock

honestly terrible cp. you might be able to get away with him as a prestiger since his defense is so good.

Your better of investing in vaporeon

I was lucky enough to evolve a perfect-IV Machamp with C/CC. Powered it up to ~2550, attacked a 2900 Blissey, didn't dodge ZH's and missed 2 dodges on DG's (which are spammed really quickly when Blissey is taking a lot of DPS), and died horribly. Next try I was careful, dodged everything, and killed it with about 40 seconds left, and maybe 20% of my health left. Hope this gives you an idea of the best-case scenario against the pink menace!

For the record, while C/DP Machamp may be theoretically higher DPS, I was afraid to even use CC on cooldown due to incoming DG's, so I wouldn't want to spend any more time locked in animations. If you have to DP every few seconds, you're going to die before you can kill the Blissey, because it WILL be hitting you with several DG's.