two words "Artificial Difficulty" ever since i heard someone say it it made perfect sense, instead of content with real ways to fight monsters they just make them spam AoE's and have ungodly evasion and claim its higher difficulty. That would be like going on a advance driving lesson on a single lane road and being told to pass the car infront of you or fail.
Why couldn't SE make more fight gimmicks like shields/barriers that need a certain damage to break or a voidwatch'ish system where proc'ing at the right time toned the enemy down making it more manageable.