Ideas and suggestions.

The spell that grants bonus movement points while on water, which was also suggested, should have a limit on the number of times it can be used per turn.

We need to immediately assess the maximum movement bonus per day. For example, for Logistics, it's 600 movement points. If the spell grants more (even at the cost of mana), it's a must-have and cannot be countered.

Therefore, it should either grant significantly less or impose some kind of restriction on gaining movement points.

Ideally, we should create control spells for lower levels (1-2-3). There's no need to add anything on level 5 (there's already a lot), and adding one spell on level 4 is acceptable.

Also, spells should be usable and without an element, but the benefit of leveling up the element should be significant enough to warrant taking it during level-up. However, it shouldn't be overpowered.