Blue crystal

I reached the guardians, and it's just ridiculously difficult. I managed to defeat the melee unit and the archer, but the flying unit is a complete nightmare. It eliminates me in the first turn without giving me a chance. It has dragons with 34 initiative, and all other units have 25+ initiative. My djinn with an artifact that gives +35% initiative can't even go first, let alone the gargoyles. Honestly, I don't see any chance of winning.

Also, there was a message at the beginning about the bonuses provided by the red crystal, but it seems they don't work. The random bonus definitely doesn't work.