Huh, i'd have to clone my entire team, since i'm shooting for 53 on all of them just to fight the Elite Four, and no way would i do it all over again :/
I'd figure luck would will out in terms of the OHKO moves (to remove them from banned status). I think i've only ever seen Guillotine work once, ever, and that was back on Silver.
Double Team i'll agree is broken. They should have added a mechanism similar to Detect on it, except that it would apply across the whole battle (Detect's just affecting consecutive uses, Double Team could drop to, say, 75% chance of working after the first hit)
Monster Hunter: pissing me off since 2010.