I'm going with cleric at 52 with a soulstripper 1hb and full intricate defiant armor and shield. The rest of the slots items 50+ in pok vendor or hotzone quest. If
no haste item in the mix would run highest tribute haste possible.
I would get Virtue, Tranquility, Spiritual Dominion, Replenishment, Focus of Soul, Strength of Tunare and Speed of Vallon.
I would use skinspike potions and heal over time potions when the refresh timer comes back up, of course my heals when needed.
Ward of Divine is a nice cleric spell at 50. I wouldn't waste time with my zero check to magic nukes surely the dragons would resist!
I dont think stuns can land on a dragon either.
Good Luck