how is that any fun?
you are a berserker, you have so many ways to restore health...
spilling the blood of your enemies, murdering them while unstoppable, vitality...
--firstly, you only loose health when there are enemies around, so you can just leave on and forget, it is NOT going to kill you in your sleep, unless there is some creeper watching you.
--secondly, actual loses.
and you are losing 2 % each turn. so if you have 500hp (solid mid game?) that's 10hp per turn isn't it...
-restoration.
bloodbath, in the bloodthirst category, can stack up to 29 a turn, if you crit every now and then. it lasts for 11 turns, so you have some room.
vitality in the conditioning talent adds lets say 20 (max 27, but that's at 100 con), which is already twice the established loss of health, and additional 2.2% of your max health, making it all together 3 times the loss.
then you also have fast metabolism, which gives you up to 8.9, which combined with your natural regen, also cancels out the cost.
that's still not enough? you can pick a discord category for blood splash, and gain up to 50 hp every now and then.
tht's STILL
SOMEHOW not enough?! pick blood torrent prodigy! every stronger hit will cause you to destroy all enemies near you, and absorb they blood restoring you by a masive ammoun!
end. lets say you actually managed to get 2000 hp late game, and you have now 40hp per turn cost.
blood bath and fast metabolism+base regen cancels it, THEN you still have 2 ways of regaining health by being hit, and 1 extra bust on critting.
berserker is NOT hurt by any means. anty fun? MINOR inconvinience. one might even argue that he is TOO durable!.
i know something about that, i spend like 100 turns, frozen, in a room full of orc cryomancers and orc pyromancers!
that's just passive life regen.
then you have shields, flat heals and unstoppable talent...
also, apparently bulwark stil has the old berserk talent
---edit
loked up some winners with investment berserk
Bregan - 2001hp, normal adventure, 5/5 berserk
Ak - 1802hp, normal adventure, 5/5 berserk
Missing portal - 1621hp, nightmare adventure 5/5 berserk
Beudrasin - 2408hp, normal roguelike, 4/5 berserk
JR - 2182hp, noghtmare roguelike, 5/5 berserk
so yeah, 2000 hp and 40 cost on average seems accurate.