-Nice Kingdom building no one man army crap
-MC becomes full fledged mage so no worries on that
Fake Tragedy, Main chars are generally immune and its just death all around him, in fact the mains have a good helping of Deus ex.
MC is both underpowered and overpowered. His true enemies are so far above him its one of those, I won't even kill you scenarios, but he's overpowered when compared everyone else.
MC trashes villian? what does villian do? does he come back and try again? no... Does he go get friends? no... he gives up and cuts his losses like any normal person would do after almost dying.