Ill clarify a few things. This staff does indeed do 100-200 Spirit takers (on my smn) to T mobs.
Spirit takers drop to about 60-80 on anything above T
Retribution does 300-400 on mobs up to T and 100-200 on anything above T.
"Occasionally" is really "90% of the time" 1 hit is rare.
A friend of mine has a kraken, Merc Pole + Kraken can make darkness skillchain and 2 SMN's can MB it duo. Lots of fun.