Well I've got a heal charm and a dmg charm, i'am a magician, the order of the items are: weapon/armor/charm/acc charm , so what i must put on charm and on acc charm ? im doubting with heal charm and mg charm, ask this pls

Acc chamr = -75% of ee

Depends, if you plan on going solo then definitely put your Attack charm in main slot, and Heal in the accessory, BUT if you're planning on Catacombing a lot, then put your Heal charm as main, so you can heal your teammates better.