insta kill normal mob

This is extremely frustrating, they are not just rare, normal mobs like the conjurer that explodes blood on the ground, kills me with a single hit... in flower fields you can't see anything on the ground... and this mob shouldn't have so much damage, especially for a warrior who is melee, you never see where it's going to explode, you lose the map, the experience... it will be the reason to stop playing... I don't die to the boss or to rares, but to the conjurer, normal mob!