I have an m0 rico and i nearly have all the micro upgrades 43/50, I'm not bragging but to be honest even though I have rico, every time i see people with hornets or wasps they would always attack from behind,knowing it will take a long time for the rico to turn around so I could attack. so yh The best way to attack are to use freeze/isida/twins(high upgrades) and hornet/wasp/wiking(high upgrades) if you have them attack them from behind and try to stay out of there turning region. try to confuse them a lot, thats what a lot of my enemies tend to do so yh. (no, I'm not dumb if you think i am now that i have told a way to defeat ricos and i'm one) <_<