Strength, Intelligence based build
Other notes:
Dark sorcery themed build as dark sorceries scale with both strength and intelligence compared to regular sorceries.
If you don't want to go through NG+ to get pursuers and manus catalyst I'd recommend getting pursuers in regular NG and then getting the tin crystallisation catalyst (The manus catalyst is just for aesthetic).
The armour of artorias can also be replaced for the gold hemmed cloak and the bloated sorcerer head can be replaced for the dark mask.
Stats can be adjusted to fit whether you'd prefer a melee style build or a sorcery style one whilst still incorporating the other element.
When choosing a strength weapon to go with the build I'd recommend one that can be buffed using crystal magic weapon (such as the man-serpent great sword).