You ask how a mage should allocate their stats?
Obviously, max out physical attack and defensive resistance!
…
You ask what to do when the enemy assassin dives your backline?
That’s a question you should ask the assassin.
Assassin: No idea. I heard the backline had a healer, so I went in. Nobody told me they could knock me unconscious with one whack.
…
You ask what to do when a god sets their sights on you and wants you dead?
God: Magic attack! Physical attack! Mental attack! Attack! Attack! Attack! Huh? Why isn’t their health going down?
Zhong Qi: What? The god’s health bar is showing! (Swings staff) 80! 80! 80!
What kind of healer beats people with a staff?
It's very good, not too invincible, nor does it have a slap-in-the-face plot that is particularly uncomfortable to watch, and the protagonist is not too strong.