- There is no level scaling in the game.
- Summons only last a short duration before they disappear. It wouldn't have been able to stay there anyway.
- The player's level cap is going to be 20, so an ability cap of 5 means you could certainly run out of really attractive things to put points into.
- I agree that only having Rangers be able to learn Resurrect isn't the best idea, but why give it to water mages when air could do just as well (and even used to be the required ability)