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It's okay, you can divert the elementals.
But then you can use them to block archers, close off passages between obstacles, and shield your own units – like the genies.
For a summoner, the more units on the battlefield, the better.
Added 5 minutes later
And in general, the main thing about his ability is the enhancement of the "Summon Elementals" and "Phoenix" spells. And it's a significant enhancement – +1 to spell power for every 3 levels.
But then you can use them to block archers, close off passages between obstacles, and shield your own units – like the genies.
For a summoner, the more units on the battlefield, the better.
Added 5 minutes later
And in general, the main thing about his ability is the enhancement of the "Summon Elementals" and "Phoenix" spells. And it's a significant enhancement – +1 to spell power for every 3 levels.