You have three paths ahead of you, bearer of the curse. You can go for sorceries (INT), which will give you a good number of offensive spells, or go for miracles (FTH), which gives you a great deal of support spells, like heal, cure poison, magic barrier, etc. Lightning spears are shit, emit force / heavenly thunder are not bad, but miracles simply aren't that good for offense. The third option is to go all the way, and pump up both, which will provide you with even more offensive spells, but of course you'll have less points for other stats.
I'd say around 42 INT or 42 FTH is good enough if you focus on any (though the most powerful spell tool for either requires 50 stat, might go for that), for being a hexer I'd go with 32/28 (for specific spells). In any case, for combat, pick a weapon you like, get the minimum required STR and DEX, infuse it with the appropriate element (magic with faint stone, lightning or dark) and throw the appropriate buff on if you want to hurt them.
Since you said you want a break from melee fighting, a sorcery or a hexer build might be the way to go, for offensive spellcasting. Needless to say, at least 20 ATT is pretty much required.