Have you summoned your creature? Mine (with a mage head) was helpful taking out the paladins, and when that was done kept Zandalor distracted while I went after the Divine. I used a bow a little bit (no ranger skills) and Rush Attacked paladins (preferably ones alone) until there were none left, making sure not to stand still too long at the beginning of the fight, so I didn't get surrounded.
Do you have any spare skill points you can put into Summon Demon, or something?
There is a skill book on the floor at the stairs leading into the main room from the entrance, and if you have a save before entering Ygerna's memory, you can return to the battle tower (from the dragon sections of the Hall of Echoes) to adjust your skills or enchantments, etc.
After adding a couple Regeneration Auras to jewelry (preferably level 10), I'd suggest filling any remaining enchantment slots with level 9 Static Charge. On armour I mostly went with level 9 Life Line, with a couple resistance auras.
For skills, I went with Dual Wielding 13, Bleed 10, Evade 1, Rush Attack 1 and Whirlwind 1. Support skills included Mana Efficiency 5, Healing 1, Mana Leech 1 (probably not necessary) and Life Leech 1. I had a couple levels of Regenerate before the Hall of Echoes, but didn't relearn it when I reskilled.
