Firstly, u must know secret reserve working depend on hp regen. If u watch on that video, that guy have 300+ hp regen. And his skill secret reserve is 4/4. So its acceptable if he got regen like that.
Secondly, secret reserve only working every 5 minutes. I repeat, 5 minutes!
Thirdly, DK must sacrifice to ench life steal on amulet, cape and ring if them want get maximun regen. Trust me, if DK not ench fully regen on accesory + not have buff hp regen from guild its very imposibble DK can get 150 hp regen. Secret reserve will be useless to DK.
Forthly, secret reserve working in two ways. When you hp under 30% and 15%. With hp balance 30%, DK totally will get destroy by opponet if them cant make time to hold enemy and get regen for a moment.
I hope GM will stop making same mistake like what happened to rogue after them got nerf.
This just my opinion as user DK.
Ilknightll
US Server