The tactic against archers is to put out only scouts. Use them to engage in melee combat, and the hero shoots the archers with spells. That's all :)
Added 1 hour 6 minutes ago
I tested the usefulness of summoning magic for the Shadow League!
Iranna - level 15 Attack 11 Spell Power 14 Summoning Magic Expert + skill to increase spell power for the Phoenix.
Summoned a Phoenix: Attack 51!!!!!!!!!! Defense 44!!!!!!!! Initiative 15!!!!! (can be further increased with artifacts and speed from the attack branch) 840 HP!!!!! Damage 180-270 And this is only with Spell Power 14!!! Imagine a level 20 hero and Spell Power of 20!!!
I fought Obsidian Gargoyles. The damage was 1000+!!!!
And Raise Dead 780 HP!!
In conclusion: if the dungeon buffs summoning magic, it's a disaster for everything alive! No one will be able to take down such a Phoenix!!!! Chaos magic is nothing compared to this monster on the battlefield!!!