I made a mage, and I'm wondering what I should go for here, in terms of stats (Obviously I cant buy any gear, I's poor)

Also, I noticed that not all the magic effects work with the Acc charm thing, which ones do?

Thanks

on acc charms the only thing that will work is EE
and the total effect of the acc charm is 75% of it's usual
if you're in catacombs it will only cost 75% of it's mana to cast with though, making it a good choice to put a heal mastery charm in your main slot and use the acc slot to heal

for the first bunch of levels you might want to melee
which would mean a weapon with EE, and then on your armor and charm you could look for things among the following: Life per Attack, Life per Kill, Strength, Dex

then once you're at a level where you want to start casting you want the following:
catacomb setup: heal mastery on everything, except acc charm, where you want a high EE heal charm
solo setup: int on weapon, int on armor, EE on main attack charm, EE on acc slot heal charm, the heal charm won't be a huge priority until you're a higher level

JB gave a pretty good answer, if you have any further questions feel free to PM me