How to beat legendary Calus Hunter solo  

theres a cheese spot. you can get underneath the stairs leading to the rally flag, if you jump off the side theres a little ledge, land on that and crouch under the stairs, to start the fight just crouch walk towards the boss, he cant hit you, But i would recommend taking out the tormentors before the last phase.

im a vet recently returning and my god is this fight annoying me

me struggling to beat calus normally at the right power level

Damn dude that was so close

Honestly Two Tailed carried me through the entire thing on all characters