Alright, you dont really need blind-light. I just tried again and 1 Entropy-Blast was enought to kill Waizer. Same goes for Conflagration on groups, you dont need Blind-Light for that one
Just make a Wildcat, use the speed-build to get far in the game. But here it comes: USE BLIND-LIGHT, then if ur going against a group CONFLAGRATION the hell out of every enemy and if you go against one ENTROPY-BLAST. Just make sure you maxed on INSTINCT-COORDINATION-PRECISION-PERCEPTION. It will make things REAAAALLY EASY. If you fight Waizer in the end just use BLIND-LIGHT then ENTROPY-BLAST, you will one-shot him. I managed to solo everything in the end.