How do i kill the last boss quickly.

Answer from: RYNOknow it all
In the first half avoid the hoverthrone shots and kill minions however you want, when a laser is fired use reflector gadget on hoverthrone to disable the shield then the easiest way is with the ryno just shoot until out of ammo then get the ammo pad yes ammo pads cant be re used but through the course of the battle they reappear. repeat this till stage two

p.s
to get the ryno collect 280 critters and complete all croid labs but the one in uzo city has to be done last to get the ryno. if you have already done the uzo city lab do it again

p.s.s
look up the croid labs exact locations if you are really stuck

p.p.s
in the second half again use the ryno you can shoot all the time when hes grivelnox or firenox when hes electronox simply shoot the generators when they appear and when given opportunity to mortar slam do so as fast as possibble

Answer from: KING_OF_DEATH
I upgraded every single weapon to elite it works perfect like that