I've been doing:
(While having at least 2 FM) and WS set (with Tiara+2 and Loki's now instead of Aias and Casaque+2)
CF - Box Step - NFR3 - Rudra's - Reverse - Rudra's
I've been getting about 4.5k per Rudra's on NM's (Kuk and EE are what I tested on last night) + variable darkness dmg, usually 5-6k. One of my x2Rudra combos took off 20% of EE's HP. Not bad for a solo SC you can do once every 3 minutes, or...
...1.5 minutes if you get a good Conserve TP proc you might be able to do this with Presto>Box Step and w/o NFR after CF. Going to test this in a little while. But x2Rudra's is definitely sick regardless