Alex_soldier
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Yes, for now, but this text is already two years old!
Currently, many things are being reconsidered.
In particular, here's an idea: choosing the form of a spell.
If you need to protect a unit from an excessively hostile environment, the Ring of Elementals will be indispensable.
If you need to concentrate striking power in one monster, use a targeted summon.
I'm also considering the option of barricading passages, something like a Wall of Elementals.