Hi everyone,
I thought that this might be of interest, since (contrary to common belief) I think that the easiest path to complete Necropolis with a team built around Aegon, is the Red Goblin path. And I'm putting my theory to the test. I should add that I have not fought a single Abyss fight but I have actually explored Labyrinth, with a 5R5 Aegon a couple years back. The rewards were already outdated, but I had things to prove to myself i guess, so I did it anyway.
Here's what the stash looked like at the beginning of the run:

The number of the available units will change in a couple of days, since the Banguet starts and I want to ensure max alliance milestone rewards. I estimate that I will have 2,200 units at least available, though.
BUT... the issue I had to tackle was that Aegon is 6R4, but only two days away from 6R5 (once AQ rewards drop) and a few days away from Ascension (once max alliance Banguet milestone is reached). While at the same time I had some health potions expiring, which would be a shame. So... what I decided to do is start my Necropolis run with Aegon at 6R4, use my health potions building up his combo in the Red Goblin fight, then wait out for both his rank up and ascension. And that's what I did.
The team:

I was planning to use my 6R4 Wiccan for the reverse controls phase of the final boss, but... I managed to pull a 7* Juggs! In this picture, he is un-leveled up, which will change once Level Up event shows up.
And, here we go:

Apparently a bug, which gives us the chance to get a quite nice screenshot. Why not?
For the first fight, no change in my usual masteries, Nick Fury gets to live and we start punching Red Goblin. It took me 12 revives and lots of health potions to heal up each time, but RG is down and Aegon is at 981 combo. Almost max, not bad at all! The highest combo I reached each time was around 130-140 hits and I'm extremely proud of the fact that through the whole process, I only got a combo in the face / got hit, once! That's encouraging!
I will keep updating the thread each fight for anyone interested. Thanks!