During zvz games I like to go corruptors once the bang/speedling phase is over because my oppenent always goes muta. If I get three or four of them out first I demolish the enemy air and then I can switch to mutas. This give me air control and a massive advantage.
I haven't really encountered anyone else who goes corruptors before muta. Is this for some reason I haven't encountered yet? Is there a flaw in this move?