Just remember, while mitosis can lobotomize creatures, it also lets the person create many more of the same creature if you don't kill it, which will let them use that skill multiple times a turn later. Unless its a buffed-up otyugh, mutant, or something like that, mitosis is probably not a good idea for lobotomizing something.
Sometimes waiting to play creatures you can play will give you more time before the opponent decides to use quanta on CC instead of on getting his/her own creatures. This is situational, though, and may take a while to learn when to summon and when not to summon.