I was level 25 and had very hard as well.
In my first attempts I could sometimes kill him but the minions got me afterwards.
Here is my technique, I do not use the spoil tag considering this is the help/hint/trick forum.
Tell me if I should and I will.
I found out, by chance, that in the upper far left there is the open area with the teleporter.
This is where your are teleported if you land down where you came from after the fight.
You can also reach this area by flying and you are automatically transformed back in human form and Azgan does not attack you.
After the conversation and the first transformation I destroy the first nest then rush there and wait to get my health back.
Then quicksave and I rush the 2nd nest and back there. Get health back, quicksave.
Then while finishing Azgan and its minions do not hesitate to got back, replenish life, strike again and so on.
Imarion.
