Hat- Potential Targa Helmet(Luk), Optimally with %Int and +Luck Or even more ideally Potential Chaos Zakum Helmet, for the same stats.
Overalls-Any %Int that is above level 71.
Earrings-Any %Int that is above level 71.
Belt- Black belt scrolled for luck
Shield- I personally like the maple magician shield, Scrolled for luck because it has 10 slots and Shield Scrolls for luck are very very cheap.
Cape- I like scrub scrolling a level 75 cape for Luck. Then having Potential '+all stats' so I can use it on every character at least decently. While that isn't optimal I'm sure you gathered that %Int is optimal and you should go for that.
Shoes- I like scrub scrolling for speed here, I know battle mages get yellow aura, but more often than not late game, they'll be using black aura for LHC, so you don't get a speed boost.
Gloves- Reverse gloves with SE and % Int but that will not happen. And it's not very intuitive, because you'll get better SE from LHC members and you WILL be going to LHC.
MATK is Magic Attack, I suggest you do more research before planning an end game character, because it is a long way off. I'm level 117 on my priest and I'm still VERY far away from endgame. Also stop adding luck you have far too much.
Just assume every item has 9%/6%Int for the potential and you'll be well on your way to never seeing the light of day again! Because being completely optimal is almost impossible!