The way this Build works is that you will power stance Helphen's Steeple and Dark Moon Greatsword, with Steeple in your right hand and Dark Moon in your left. You'll buff with Moonlight Greatsword, and then buff with Ruinous Ghostflame and then do primarily jump attacks on enemies to kill most regular enemies in one attack. Some more difficult enemies may take more.

You can rebuff easily because Ruinous Ghostflame has a modest cast time, and it only lasts half as long as Moonlight Greatsword, so you'll need to use it twice for every one cast of Moonlight. You may not be able to rebuff with Moonlight in tough fights, but you absolutely should with Ruinous in order to gain more Frost build up.

You can swap our Steeple for Staff of Loss when you need to cast Night Comet or Night Shard, to range down enemies where it's easier to do. You can swap back and forth as necessary, maybe even multiple times during the same fight.

(Patch 1.07 decreases the status buildup on dual wielded weapons.)