I would like this experimentative magic - specially when the risk of backfiring increases.

Example: I use this freezing meteorstrike - as the monster has resistance against this -> my party gets the damage. In order to avoid this, "Know Creature" would be more vital.

Or I mix spells and lack the lvl/intelligence for this => strange side effects

Or, I enter an area of wild magic => spell effects turn into the opposite.

I think, this could be a way to avoid balance issues.
Kiya