General

Can someone help me with Dyle

So i recently began playing EMS and created a Mihille because i didn't have mesos and i wouldn't need to bother with equips,so it's fine but then at lv 29 they throw you a quest where you need to kill Dyle,who constantly heals 5k+,keeps casting buffs which halves my dmg and casting invencibility on himself,i'm almost out of potions and i'm going crazy,if someone can help me my name is Spectral Sign and i'm at ch 6 Kradia.

I KNOW THIS IS THE WRONG PLACE FOR THIS THREAD,BUT I'M FIGHTING HIM FOR LIKE 20 MINUTES AND HE DOESN'T DIE!

And yes the quest IS mandatory for job adv.