ok i was asking my self if it could be a good idea to put a int charm to bost a max my atk charm that id put in acc charm

can it be a good idea?

I wouldn't do that unless I was in catacombs, in which case I'd look for either an int, or preferably a Max Mana charm.

Basically, you'll need a lot of intelligence to make up for the 75% effectiveness of your charm in the acc. slot.
Also, you lose the ability to heal, since you won't have a heal on (or at least a quality one)

PM me with any more questions

agreed. it's not advisable if you're going melee/hybrid or caster.

caster - lose the ability to heal yourself
melee - lose attack power (loss of str/dex stats)

it would totally be useful though if you were casting in catacombs if you dont plan on using an attack charm/heal combo