I lied about the insane IM artifact and made an insane cache boost instead, after calculating that I still have enough IM powers left on the maps to survive for another insane.
In fact, I'm probably not even going to make the insane IM anymore, since once I get to about +1.1k~1.2k% AP that should be enough to super ascend without doing hex earth at all. Therefore, the current goal is to accumulate as much +AP% as possible.
The insane cache boost has been incredibly helpful and has likely shaved around 12 hours off a super. Many levels can now be completed without any hospital upgrades, so I'm getting close to ~2 days per super now.
Yeah, I made the insane HB because I didn't want to make an insane IM at that time (still had plenty of unclaimed IM powers).
I also didn't want to part with my legendary AV/MD/RCB for 10 days, which would cause money problems for the super. Upgrading those to insane also would not help much since I already have more than enough money at legendary. Upgrading SAC/TW would hinder battles for 10 days, so those are also out of question. Since I didn't manage to dig a cache boost at that time, the only choice left was upgrading the HB.
It is kinda of a meme upgrade for 2% additional save, but I guess every bit of caches and saves help when you want to blitz levels.
Given his last known AP multiplier of 552x (could be higher), this is like a pre-SA player getting to 20,935AP. but of course he has all the artifacts he wants so