Congrats on getting that far by your self if it’s your first time…if you have sleeper stimulant use that, and solar special, preferably a fusion rifle..and what ever kinetic you want…the boss is finicky, he’ll do a weird teleport if you try and line him up with a super, like nova bomb or code of the missile…I prefer top tree dawnblade for the evasive capabilities. And just pound him with heavy ammo. Best of luck.

You need tips. You can do this. It is slow, but… Do not run around underneath. Use a rocket preferably with tracking. Do not use the middle drop down area. Ever unless you find yourself needing to escape from below.. Run to a side. Drop down. Do not venture off. Put damage on the boss. As he comes towards you immediately jump up and go across to the other side and drop down. Repeat damage until he his coming after you. Second and third phases, enemies will spawn in the middle of the dps phases as well as each phase. Go up, clear them.. run to the other side and drop down. Repeat. I will/would help, but I will not be home for another hour or so. But be patient. You got this. You want a solar energy weapon for the yellow bar ad phases.. Like someone else said, there is no joining. You would have to start from the beginning again.