Is caster OP???

Spellcasters are completely what you make of them. In your picture you can choose to copy paste the trees or burn them to the ground. Besides the money tree is also very cheaty.

They can be completely OP if you give them all perks and continuously use copy paste in combination with the potion of plentiful needs. I have my spellcasters specialise in one branch of magic and only get those perks, I don't use copy paste to earn money and use a mod to tone down the potion of plentiful needs.