If Vic was supposedly a pawn used by Anthony Casso then how did he retain so much power over a decade after going to prison - independent of Casso?

I mean the guy has been characterised as an insecure, subservient pushover yet he ordered and possibly carried out more killings than any other contemporary crime boss.

It fascinates me. I really don't think anyone can paint a full, consistent picture of what Amuso was like - certainly compared to other significant mafia figures. So many accounts of Amuso seem to directly contradict each other.