Try 1-2 bolt charge stronghold titans with a lightsaber built around reflection, personally one stronghold titan and one getaway artist got it done, so I imagine with a third player it’ll be much better. The timer is enough to make it to the final boss room and at that point you’re home free. Have the stronghold titans just stand there reflecting all the damage back at the bosses and the third player can shoot the orbs from cover/rift/well etc. You are 99% invincible with stronghold, with the 1% being standing still in taken goo or letting an add flank you. The timer is short yes, but as long as you all know the mechanics and jumping puzzle route beforehand it’s doable.