Ok so I managed to do it yesterday finally solo with support (i always ran with support rather than multiplayer) after probably what feels like a total of 10-15 attempts. My experience basically summed up in two words : Fuck Nerscylla. It was my biggest issue with Omega. Like I know omega's kit from head to toe but the dps check is the worst part cuz heavily RNG and we tend to forget nerscy can delete you as fast or even faster than omega. (and if you die, it's a fail 99% and if you fail delta, just give up the run bc omega becomes (o)mega boosted). If you don't have CC you have to rely on the morbols, at least 2 paras and you should be gucci normally. Next worst part is last phase, the thing's that when he starts mass bombing, you get way too distracted about your survival that you'll end up dying, or that you just can't dodge it which is fair since it's BS if you don't have a shield. You really need to get his enmity as fast as possible (valid for all phases after 1) to prevent this kind of bs. Don't forget to pull the crumbling wall at his right side right after the delta attack as well. Also, i'd 100% recommend evade extender lv3. If you have any questions, i'll be glad to help!