Imho:
aim: stack off as a favourite, be in a dominating situation.
method: best way is to see flops and evaluate. value of top pair increases somewhat. good kicker requirements decrease somewhat. two pair is practically the nuts.
problem: they 3bet you lots or raise lots
solution: open smaller, play more pots in position and less OOP. See how they react to checks. If they overadjust and start donking pot and stuff, having a checkraising range will probably be useful. I wouldn't do it with weak stuff initially, but if you find them potting then calling a reshove with junk, you can start doing it with semibluffs where you have OK equity when called, but are relying on fold equity for profit. All depends on the type of maniac...
if it goes multiway preflop frequently, you can play more connectors in position
if it ends up that they 4bet each other pre, just wait on a monster imo.
If two or more of the maniacs are to your left, I would just leave. More often than not they will have position on you, which will make your life hell as you will have to nit up.
Money flows clockwise around the table overall. having position is important.