I don't know, if this should be in the suggestion section, but in a ways it suits:
Phoenixes and Kneezles spawn in parts of the forest, where you cannot cast offemsiv spells. How to kill them? Blauflamma is possible, but it takes much too much time to slay the mobs.
In result, I think, it makes sense to make the area for offensiv spells bigger. What do you think? Opinions below