This is something I'm working on currently. Certain missions will have sort of mini-bosses with tons of health that you'll need to attack more strategically.
bro why mini bosses? i want full on gigantic cool robots with lazer beams that i gotta fight against, and btw, a melee weapon would be sick but i dont really know how to make it not be overshadowed by the other ones, maybe make it launch you forward?