After reading the internet I found I wasn't the only one with problems on this one. I did manage to do it by kiting, using HQ max-potions and cooldowns, but it was tight. Harder than the level 60 quests, harder than Zenos fights in SB MSQ line.
I'm not demanding it to be toned down, but asking SE to not go much beyond that level of difficulty for class quests because there are noobs like me who want to get them done without banging our heads against them until we've perfected them like some people do ultimate content. I realize you can't cater to casuals too much but dont lock compulsory content behind way overtoned fights please.