What it means is that it increases your MPS (mana per second) rate by 35%. Therefore, if you had a base MPS rate of say 10, it'd be increased to 13.5.

It *doesn't* give you 35% of your total mana back per second.

Has anybody tested/does anybody know if percentage regen stacks with flat regen? Or with skill/effect bonuses, such as QoT closed form?

Might as well ask it in this thread, I think.. .-.

I cannot say for certain, but I think it basically works like this:

(base mana regen + bonus mana regen rate) * (100% + % bonus regen rate)

So if your base regen rate is, say, 10 MPS, and you get 3.5 MPS and 35% mana regen from gear, then your resultant MPS is (10 + 3.5) * (1.35) = 18.225 MPS.

Also, 35% of your full mana bar per second would be insane, especially on tier-1 item... you wouldn't have to worry about mana in the game at all