well i found that i that all 3 classes were good but psych was probs my fave and hydro was kinda boring as it didnt really have a clear direction and bio is the good all rounder
ok well soz i cant help u with the whole way but i do know a basic stratagy its basically that wen hes low on focus he uses a move that gives him more focus but he takes heaps more damage so just hit him with everything u have wen hes using that move and keep destroying his focus so hell use it more often i havnt played in a wile so im not sure wat move to use but from what i can remember bio isnt really the best class to do it with but use the move disrupt i think its called that should get him 2 use the move
and if u do that u should beat him eventually
a good game but it would be better id there were descriptions of the towers and also theres a glitch were if you click on a tower to buy it then change your mind and cancel you dont get the money back