Basically I grabbed 3 of the 4 with potential as an actual weapon, and took advantage of the strength/dexterity scaling on dark magics.
Basically, for the most part, melee with your demon's catalyst, cast dark magic with your manus catalyst, cast other magic with tin crystal, or if you're worried about spellcasts, use demon's. You can, for example, cast pursuers one time with manus, and again with demon's. Demon's should do the most melee damage, followed by manus, followed by tin crystal.
