I use two sets of accs, look:
If you wanna ideal 1 set of 3 accs then for witch would be best HR with crits but those accs are expensive.
PS. Use jewels to boost your Magic/Weapon Attack and INT points for even more mag attack. Lvl 2 jewels "on all places" are just fine and cheap 'n' fast solution. 1 kind of jewel going once per item (weapon/armor).