why were there orcs near the phoenix?

More likely, they were humans. Humans were near the orcs. As for why the phoenix was the main unit for humans... well, I don't remember exactly why I came to that decision. In general, the phoenix is associated with summoning magic and the element of earth. It's clear that chaos magic and the element of fire belong to Inferno; dark magic and the element of water are closer to the Necromancers; light magic and the element of air belong to the Academy; but summoning magic and the element of earth... I decided on humans.

and why did a titan appear instead of an angel?

The mage made a mistake in translating the manuscript.

it's very difficult to defeat the apprentice mages

You need to get reinforcements of djinn from the western bridge.

there's an outpost, but the orcs don't have one

There's no point in placing one. They are allies. Why would they need it? Besides, according to the plot, it shouldn't be holding back the Titan anymore.

there's no final cutscene

I wouldn't be able to beautifully show the boss's death; unfortunately, it's not possible to do that in the game's cutscenes. I decided to simply describe it beautifully.

there, the fire and water elementals immediately react to the earth shock, while the earth elemental stands there for 10 seconds and then starts running

Because they should be "hit by the explosion" at the same time. And the earth elemental moves very quickly and ends up just standing in place, waiting for the earth shock. But it should be that it runs into it.

I completed all the additional quests except for the last prophet.

The one in the lands of humans? He asks you to find and destroy the orcish and dwarven heroes and bring him their artifacts. For this, he gives several titans to the hero's army.

in general, the map is a 5 out of 5!

Thank you for the kind feedback!