If the level of that boss is 58 and you are level 61, then there is definitely something wrong with the power of this boss. Especially when the power for the previous boss is 2,433,808 and then it jumps to 4,042,791 for this one. That is almost double the power of the previous boss and is totally out of scale compared to the progression of the prior quest bosses. Of course you expect for them to get harder as you go but a 1.6M jump in power is demoralizing for game play in the quest area. Either the power of this boss needs to be nerfed or there needs to be added a bunch more questing scenarios before getting to him in order to gain more experience and power before taking on this kind of boss and his minions.