Magic in Heroes of Might and Magic V.

There are a lot of useful spells, for example, summoning a swarm of wasps can push enemies back 0.6 on the scale, which is quite significant, even though the spell itself is simple. Summoning a hive is also a harmful spell – you have to divert attention to destroy it. Things like Crystal and Wall of Swords are generally very effective at any stage of the game. Fan and Shield are more useful in the mid-game; in the late game, they are not as helpful, although it can vary. From all this, it follows that summoning is one of the most versatile types of magic, suitable for all situations.
P.S. But in general, people will come along who take Utopia with only Hunter and Fire Trap spells and will criticize your post. So, I wouldn't be so categorical about summoning.