if you cleared up to chess after curator it's advisable to just do a few attempts at prince. once respawn sets in just do aran if you want. aran is harder than prince btw.

tips for aran:

know what to do for each of his abilities.
flame wreathe  = don't move
arcane explosion = run out asap
blizzard = look where he does a single frostbolt before his blizzard and run to the opposite side and then follow on the edge of the blizzard.

other than that kick/pummel his frostbolt and fireball. do not interrupt his arcane missiles or he would run around and that could screw up healers etc if he gets near and gets silenced.

healers need to heal people who are getting arcane missiles fast coz its the main source of death, just assist aran whenever he starts casting it.

at 40% he will summon 4 water elemental adds. banish/fear them and keep dps'ing aran. if aran's mana gets low he will aoe sheep and pyro for 7.5k. just heal up afterwards and go on as usual