So, I am on about my 20th attempt at this main story quest. I am doing this as a BLM.

I have tried the following tactics to win:
Focus just on putting AOE on the mobs. This works great for the first set of mobs, but the second set do not die fast enough.
Focus on a single mob at a time combining blizzard/fire/scathe

AOE mobs and cure Wilred. Cannot kill/cure fast enough
Focus on killing single mobs and healing Wilred. Again cannot kill heal fast enough.
Just healing Wilred. Cannot heal fast enough.

Using Scathe to try and aggro all the mobs and kite.

Also, the quest does not say so, but if the burly guy in charge of Ala Mhogo dies, you also fail the duty.

What tactic am I not using? How do I win?