[microbet]

Not really enough info, but... the game is winner take all, which calls for an aggressive strategy and if the blinds/antes are large, AND it is short-handed, AND people are folding too much, it calls for a VERY AGGRESSIVE strategy.

I don't really know the situation well enough to say this for sure, but - raise more preflop. If you have a good hand, and this "maniac" has made a raise preflop that doesn't commit his stack, you will probably be in a good position to make a big reraise. A lot of maniacs will fold to reraises pretty easily, knowing they are stealing enough blinds to make up for having to surrender a raise once in a while.