i'm running 3 sps at the moment, and only mid thirties so i cant say for certain how it will be at 70. Right now, its awesome. i have my fears on round robin, and i can take on a nearly unlimited number of mobs. 3Ve's running lets one of my priests tank a red, so i'm sure once i get shadow form it will flow even more smoothly. Another thing to consider is the spec. how many points into shadow weaving? and only one needs misery at 5/5, not to mention spirit tap is pointless...it makes for interesting spec choices.

As far as instances go, i can solo the library at 35 with only 3 characters, so i'm pretty pleased with the combo so far. Its not as easy or as high in burst damage as my shammies, or a pile of locks. But i'm doing this with the intention of grouping with a couple of mates at high level so i dont need to worry about higher 5mans and heroics.