Maniac Heads Up

I posted this in playing the player but only got one response so I am gonna try here.... I have started a regular weekly live game with about 6 guys. They don't really know a whole lot (watch tv too much). I am a serious player and I go for the cash obviously and the fun. They will go all in with a 4 straight on the board and they will have the low end. They will bet middle pair and bottom pair like they have a-a. Also, they are the type of ppl that like to bluff all the time, raising huge on the turn only to fold on the river. Always go for draws, always call with middle pair, hope for that miracle card. Ok, after the player profile, I got to heads up and it was hard to put him on any kind of a hand. How do you play a maniac player heads up? Heads up you usually hit nothing, so how can you be aggressive and reraise him if he will call with middle/bottom pair and you have nothing? You can't always fold or you will be blinded out. Thanks for the help.

P.S. I just read Harrington's section on heads up hold'em which helped some but still would like some advice!

Make hands cheap and value bet them. Don't be aggressive without a hand. Also, call down a lot with good showdown value. Look for the pattern of betting big with a draw or a weak hand, and trying to trap you with a good one.