Anything that is so easy to use that even IPL can win st7 definitely needs to go imo.
Kidding aside, I'm against banning serene grace. Relying solely on Jirachi flinching with Iron head is not a high percentage strategy, and there are a million things that resist it anyway. Iron head in conjunction with paralysis is very annoying, and when used in the hands of a capable player its quite good. But I stand by my opinion that even a "hax based strategy" like paralysis and serene grace requires a good player to use effectively. Otherwise im sure there would be a lot more paralysis teams in gen 4 than the grand total of close to 4 (obi's, djxo9 + prides, matty, ipl are the ones i recall). I think that is enough proof to show that paralysis + serene grace isnt super easy to just whip up a team using it, and its not like any of those teams were invincible. seems to me that winning with a paralysis team is on par with using a normal team just using high probability hax instead of "stalling" or "out offensing", etc.
that makes sense in my head, idk if i articulated it well