Change the damn boss mechanic/damage and skill visual

I'm so tired and pissed off with how things changed or nerfed and no balancing on uber end game boss fights. It's either getting a build to insta-kill bosses or keep ending with 1hit KO by boss with ridiculous aoe radius or compact boss room or invisible hit. I'm damn fking pissed right now after running in circle clearing map to unlock the damn unique map (Derelict Mansion) and then spawned near the door to boss room and that bitch just 1hit KO me with an invisible attack with a slap sound effect within less than a second. I was like in the map for about 10-20 sec. This is not the only fking ridiculous boss fight, there are many more and it's a complete waste of time and losing hard earned experience. This kind of game experience is simply the same as walking down the path of MS-activblizz disappointment. FYI, my build aren't the best but definitely not bad at all, I can clear map T15/16 easily also killing the boss is not too hard IF ONLY without those 1hit KO massive AOE, compact room and invisible attack. You keep nerfing many insta-kill build but never nerf those fking boss. Enough of wasting time writing feedback as I believed there are tons of similar feedback/experience by other players. I'm so sad that this game is turning into another total disappointment like D4.

Exactly! I can't see a damn thing in all these skill effects when fighting bosses.

And I absolute hate the little cut-scene sections during boss fight when they are f*cking INVINCIBLE.

The worst are tornado bird and Tavakai.