Not sure if this has been posted or not, just wondering what the best builds for each class are? Been playing a lot as mek, get to wave 18, but never past. Right now I am lvl 20, I use chopa, evy armor, boss pole, cybork bits, uge bombs, sturdy bits. I know there has to be winning combo, if you can beat wave 20 on lvl 12. So howd they do it?