It’s kinda nice that you can grind for gems easily in lava while in assault
How do you defeat the boss so many times while you have normal weapons? Let me tell you : 1st spawn ur drone when you spawn defeat the first enemies then go the the boss after destroying the robots that float then, play ring around the Rosie while shooting the boss, if the scorpion robots spawn use ur special attack (use any weapon that does more damage if your character does not have a special attack that doesn’t do damage) the. If the other bosses spawn, spawn your other drone if needed, if you defeated the boss repeat it until you got enough gems to buy something.