Just some of my opinions on what mentioned on stats and mage equipment, even I never play one. My 1st run of the game was on a dual wield warrior, and at lvl35 when fully equipment, I manage to get 90+ str and int and 60 dex. So I dont actually think playing a mage will limit one to just using the certain set armor, and honestly, archmage set is kinda junk. I had 800 hp and close to 490+mp at lvl35 as warrior. Good trinkets with minimum 2 to 3 charm slots help a lot in raising up stats, hp and mp.
And basically healing spell is something worthless when you compare it to a rank 10 potion, which you can create it easily with only 1 fanny blossom (or is another herb but definitely it only need 1 unit of 1 herb), provided you had your alchemy garden fully upgraded and lvl5 in master herbalist skill. You can collect ingredients easily and fast when you fully upgrade your runners and create tons of potions for usage, then reset your skills and unlearn master herbalist. Invest 2 to 3 points in potions efficiency and you see your hp/mp flies whenever using potions. No more such as waiting for hp/mp regen. A rank 8 and 9 potions also will suffice, as it wont have cool down duration as compare healing.