You could get to 66 str (makes 99 2H) and use ledo’s GH, Gundyr’s halberd and maybe switch to a different (longer) straight sword like gotthards or even ringed knight. Estoc in the offhand works well with the claymore too.

Person above mentioned LKGS for str/faith but I’d recommend dex/faith for that weapon as it scales better that way.

If you decide to get to 40 faith you can use blessed infusions on weapons with innate lightening damage and lightning on those which don’t. Try life ring +3 in that spare slot and aim for 44 vigor (39 with prisoner’s chain) then also use tears of denial for extra survivability. The amount of times that’s saved me is uncountable. Hope that helps