as i get it was a accident but i've done it many times as a tanker xD
there are 2 ways but both take a lot of clerics for sure
*1 tanker:1400+ hp would help a lot lol aka boost yourself with cleric buff, vit[2] and you'll do it ez, ofc def scroll too
*2 tankers: weaker will take aggro and most heals and dps.
second tank will take 1 or 2 clerics and just survive while other boss is killed so after it whole dps goes on it
It aint hard btw. as of i tanked since lvl 17 all my mara kq's by myself, since i was lvl 20+ we took 2 bosses same time, so yeah ^^