Ray, its already way too easy with the current potencial, the slaves/char are way too op when max out.
you can use magic equips to enhace it, through equips you can get up to +4 for agi and maf (any elf sword, ninja suit with agi enchantment and a acc with agi enchantment/staff + magic robe with maf enchant + acc with maf enchant) and +2 for str and end (any armor or acc with str or end enchantment). You can get 2 more maf from tattoos.
not sure if there is aditional bonus in the last public version, didnt played much since then.