This should not have taken as long as it did, nearly 60 hours in total.
It didn't take that long to get the general strat down for surviving during damage, but it definitely did take some practice to refine the grapple meleeing. The main problems here were cursed thrall (because I'm bad), and wizards not caring (who could've seen that one coming). Heavy ammo was also occasionally an issue. Also, if no ads walked behind Ir Yut during damage, it wasn't looking good. A 2phase is theoretically possible, but I haven't gotten a good enough second phase. If Winter's Guile gets the Wormgod's treatment, then this won't be nearly as annoying.
Lastly, I didn't end up using any of the solar artifact mods because radiant oneshot the wizards, which was annoying when I wasn't paying attention.
Loadouts:
https://dim.gg/w4dnxyi/IrYutRunning
https://dim.gg/ekknnxq/IrYutAmmo
https://dim.gg/fo52iaa/IrYutDamage

0:00 1st Phase Running
3:57 1st Phase Damage
4:43 2nd Phase Running
6:39 2nd Phase Damage
7:21 3rd Phase Running
9:36 3rd Phase Damage