re: Poker & Maniac big stacks on your left
I'll second TeUnit. Patience. You obviously want to get in on free money available from the short stacks but with two other large stacks that usually have position on you and being more aggressive than you, I find it smart to tighten your range. This way when you do raise and they 3bet light you are more likely to be ahead of them and have a chance of breaking their stack. With 50BB and a full table you can afford to be more patient to find opportunities to capitalize on other players mistakes instead of trying to create or force opportunities.