In a regular graveyard, the zombies are no problem, right? The only problem is the phantoms? You might consider charging Blitz Needle. I usually just charge my elemental sword on them. WRH's charge may not be reliable for you, though. Charging Brandish or DA or FoV is.
In Legion of Almire, the Almirian Crusaders, slag guards, and dreadnoughts are the main problem, right? Definitely Blitz Needle. If you want a gun for the little enemies, any of the elemental guns will work. I imagine that the alchemers will out-damage AP, but I have no evidence to back up that claim. I usually play with elemental sword, Blitz Needle, and maybe Shivermist Buster if the party wants it.
When solo I go Valiance, Magma, Polaris.
Parties I swap between Valiance and Storm Driver.
Valiance ftw, pushes back the charging knights and bomb skellies. Two shot and stop makes it damage high enough to almost equal an alchemer.