i did beat the final boss in normal mode.
nothing different from the usual combo's that every one used to beat him.
but , when i was done with him, i was still in full health(595) thanks to repair kits and repair drone
the weapons included lava spray. meltdown hammer,inferno mark ii,cooker(197 energy,145 heat,about 100 regeneration and 89 cooling + the boosting kits taht boost these stats,energy shield)
tactic was to back up to the leftmost point of the battle field, forcing them to come close to me.
but the point is , it is really boring
i sit in a corner heating ,slashing, heating slashing on and on and when i ran out of 'number of uses'
i used stomp and cooker(a small weapon with 30 heat and 25-35 damage,may nobody even notice it),
no action at all
if anybody knows of any other action packed way please let me know
and if the developers are reading this, please modify the game with some weapons to kill the boss in a not so 'boring way'