Was there a big nerf to ehp recently or something?

So ive started to attempt to get going with hybrid slightly atleast right, and i have t15 unlocked, working on trying to reach t16, ive reach wave 164 in t15 before in the past, which would have been like 3 or 4 months ago i think, and ive had massive upgrades in that time period

Now explain to be though, why even though i have 5 more card slots, chain lightning in general, with mythic dim core with mythic CL dmg/chance/quantity for it to do atleast a little something. I have about 3x the health regen i used to have, with my health regen starting at max now, while before around when i got the 164 wave run it would have been starting at only 4900-5200, and i know didnt get gold boxed mid run. I have a mythic sharp fortitude now, which i would have had only a legendary before. And i also have a mythic orbital augment for a while now. And my base ho is now around 3-4x higher than what it was before, with my wall health being i think 2-3x higher, so combined with my base hp being 3-4x higher, the wall is significantly higher than before. And my tower attack speed having gone from 12-14 before to now its 24.2, so roughly 2x more attack speed.

So all that, and maybe more that im forgetting about, but yet instead of getting significantly higher than my wave 164 run i have had in the past with massively lower ststs and only ehp with no damage at all, the highest i can get now, has only been wave 112.... wtf