lol, most characters need to be pumped up with the protect milk and also power water.
I don't think the spells are powerful enough to wipe out enemies in 2 hits unless you are willing to use a lot of fairy tears
You can also share items between other characters as long as they can use it like spears for the knights and swords for bowie and ninja etc
Ah must be you buying the apples at the shop?? haha