Really loving the archive. The concept is insanely good. But after a few runs, I'm noticing one thing that many others that have done it a few times now are also saying...
It takes TOO long to progress through it
Each of my runs has been 3-5 hours now. That is a bit more than most want to sit down for. The # of bosses per arc feels great, but I think removing one of the non-boss stages from each cycle would go a long way. So maybe 3 stages total instead of 4 for each cycle (2 stages of adds + 1 boss = 1 cycle.) The base pop starts to feel really tedious having to do the same 3 pack formula over and over to get to the bosses.
The difficulty ramp up from arc 1 > arc 2 > arc 3 > etc. feels good I think. And through the smaller increments as well. It just takes too long to progress through them.
Also, someone tested and noticed that the bosses in the arc have a pattern of 9100, 18200, 27300, and 36400 resistances. And the Marauder's that drop in also have 36400 resistances. This is especially out of whack with the rest of the adds that accompany the Marauder as they only have 9100 resistance. So essentially you have to build for WAY over pen on all of the adds on the off chance that the Marauder drops in. I'm not sure if this is intentional but thought it was worth bringing up at least in case it isn't.