Masamune recently suggested that crit rate on weaponskills may cap at 50%. I'm going to first try to determine what it is on normal hits, and then try SF-Rudra's... Or do both tests at once because otherwise it'll take me forever to get 100TP <_<;;

Also, 4-5k with Raging Rush is pretty typical on trash mobs if you're getting Triple Attack procs. I use an Atlas +2 (STR/Atk path) when I go out. Spheroids definitely have lower defense than Bluffalo though (Buffalo have a DEF boost to match their xp boost).