Cannon Question help
 

Okay this has been messing with my mind for a long time im cannon lvl 16 and next level i get explosive after that should i max out thunderbolt then when i get fury should i max out fury or should i max out cannon shooting?

Max out cannon shooting? Not sure what you mean here.

I personally like to max the primary cannon skill which increases firing rate. (I can do this without having to consider ANY rep penalties)
I also like to max the first passive skill that is reload speed. (also no rep penalties)

This makes lightning all the more effective being able to fire/reload much faster. Personally I start applying extra points to the various ammo types once I have the cannons mastered. I have found that lightning maxed is very helpful on Boss battles, and just about everywhere else. Fury is real cool, but often lags people out.

Max out shoot, max out reload, max out fury, thunder and barrage...