PoE Endgame challenges always make me quit as melee

As already said, DPS is king for Feared. Failing that you need very good sustain to be able to ignore most of the dots. I did it on boneshatter of complex trauma jugg which has very good sustain, as long as you manage to keep hitting things. I don't know what my DPS was when I did the fight but I don't think it was much more than 5M, maybe a bit more when I could get overlaps.

For the challenge (4 mods on the invite) I recommend alt spamming until you get 2 good mods, then regal+exalt. Scour and go again if you hit something bad on the regal/ex.

I got hard wrecked by Uber Sirus when I did my first uber runs this league. Might try again now with better DPS.

I've done 5 tries, got furthest on the first attempt. Did really poorly on the remainder. even rolled with four dead mods (im curse immune and don't use accuracy etc.). The only thing I've learnt from the fight is that dread doesn't do his oneshot spell until he has lost some amount of life (not sure how much). So you either avoid damaging him, or kill him depending on which other bosses come out.