The first Offline Tournaments for Heroes 5!

This is one of the most challenging battles on this map; the key is to reach the Ents with as much mana as possible. I divided the Cave Dwellers into two slots (to increase the number of destructive beams). I use gating creatures to block access to the main army and Phantoms (I create Phantoms from the strongest stack, and it's essential to use a Phantom for gating). While the hero has mana, the archers should NOT attack! (because there's a chance they'll attack with fire, and a fire attack consumes mana).

In my opinion, even if you attack with one Imp to remove the retaliation, you can still end up losing mana. I think it's not just the archers that have the ability to deal additional fire damage, which consumes the hero's mana. Please dispel my doubts or confirm it. :)
I'd also like to ask shoot-nick, if it's not too much trouble and if it's not just me who needs this. I want to save your description as a leader for future reference. But I'd like to see not only the unit losses in battle but also the dynamic distribution of Agrael's mana as the map progresses. That is, how much mana there was at the beginning of the day, how much mana was gained, and how much mana was lost or gained in battle. After all, almost all battles are fought without unit losses. The main thing in this playthrough is mana loss. I didn't doubt and don't doubt the reality of your playthrough. I just want to have a more complete description of the leader. In principle, it's very good, but in my opinion, it lacks what I'm asking for.
In my description, I try not to miss this point, considering it one of the important ones.