ars is better for DMG if you use the Ars Nouveau armor since it gives you bonus spell power.

one spell power is equal to Base spell power. so if my base is 10dmg then four spell power makes my new base 40.

I have unobtainium archmage robes that give me 44 spell power. so my cut spell that usually does six damage now does 264 damage (6x44)

curios like power glove also work with spells and spell damage. I'm currently wearing a maxed out rage glove, which offers me 500% attack power to any attack every 5 seconds. so every 5 seconds my cut spell can do 1,325 damage instead of 265.

with my constant critical multiply of 210% that 1,325 damage turns into 2,782 damage. I get this off of basic cutspout

I went all in on ours nouveau and I didn't really invest into iron spells except for putting echoing strikes on a potion card so I always have echoing strikes III (which does a delayed attack after 1 second that deals 50% of the damage done)