-Dark Orb is weaker than Great Heavy Soul Arrow on most common enemies (I used the Hollow Crossbow Archers).
Oolacile Catalyst (180 Mag Adj)
Dark Orb: 309
Manus Catalyst (220 Mag Adj)
Dark Orb: 428
As you can see the difference in "increase" of the dark sorcery is very low. It could be related to the high Str of my build (26 Str).
-Str at 26 and 27 with Manus Catalyst:
Dark Orb: 428 and 433
GHSA: same as above (constant)
Str indeed increases the damage done by the Dark Sorceries, but it's a very low increase. Could have increasing returns with higher Str. Oolacile Catalyst values remained constant.
-Dark Orb and GHSA damage on Crystal Golems with Oolacile Catalyst:
Dark Orb: 60
Crystal Golems have very high magical defense. Don't know why from says that dark sorceries do physical damage lol. GMB also nullifies them.
So there it is. If you're thinking about using Manus Catalyst then stop increasing Int at 32 for Pursuers and increase Str to 40. You can also use it as low weight main Str weapon since it has same moveset as a greataxe. Awesome!!!!!