Horus / Osiris
Somehow this anima is not guaranteed
Overview
With Extra Rank Point gain events, you might also be Rank 170+ at this point. You can farm Dark Rapture HL first to get / uncap your Dark Opus to ULB (5★). This will boost your damage by a lot. You can also farm Belial after this to get access to Chain of Falsehood which enables you to burst with normal attack setups.
If you did not pick Dark’s Dark Opus from the side story, it is also viable to farm Dark Rapture N first to get the weapon.
Osiris is mainly farmed for the anima to raise character awakening but the weapon can be used as a placeholder. You can aim for Abydos. You can use 1-2 as placeholders on normal attack setups.
Setup
You can always use the usual setup so far however you need to reach ~480k honor.