fire and ice, when fire, doesn't trigger the maran mantle fire healing affect. At least at times.

<570hp 192m 526mv 26104tnl>
Hafizar sings 'Some say the world will end in fire, some say in ice.
From what I've tasted of desire
I hold with those who favor fire.
But if it had to perish twice,
I think I know enough of hate
To say that for destruction ice is also great
And would suffice.'
Hafizar's fiery illusion startles you.
Hafizar's fiery illusion RATTLES a Maran Tara'bal!
Hafizar is gushing blood.

I notice that this part is qualified as an illusion, and startle is mental damage, not fire damage. I know the later more powerful steps up are fire not mental damage, and didn't know if this was mean to be different or a bug.

fiery illusion is mental damage
ball of fire is fire damage

Both are by design.