It took me 7 tries to pass the Reason Roallie quest with my SCH!

This has to be the most frustrated dumbest quest i played in MMO history. In which Ilberd fights off against Roallie, Roallie is immortal and can't die until you beat her 20000000 mobs that join her, Ilberd is wearing toilet paper for armor and dies with ease cause he isn't smart enough to dodge Roallie's AOE's . Even when i took the advice to kill the deathhand and healers, HE STILL dies with ease. I finally passed it with luck thanks to Cleric stance cause the SCH is so weak when it comes to DPS that he depends on cross abilities, seriously...i can't heal as good as White mages or do as good as DPS as Summoners unless i using cross abilities

Its not at all a soloing class!!!!!

but im so mad that i don't even want to do solo quest with my healer anymore. Why are quest so DPS and tank orienated? Am i going to expect anymore quest in which i have to fight off the entire army worth of mobs?