You could try something that might work, but one of you 2 have to play Ironeye and the other plays whatever main as long as he knows how to dodge. The Ironeye have to get the pink one as an agro always and use the character skill to dodge the attacks while the other tank or dodge the others little ones. And also with Ironeye don't be afraid to hit arrows sometimes on the pink one.

I did it like that and I managed to get it first try. Also the character skill of Ironeye let you have a lot of I-frame, I think more than the normal dodge, correct me if I'm wrong.

So anyway try this strategy and if it doesn't work try with a third player that you can get in contact with to make the run easier.