I thought about it as well but I took a look at Brusalk and a few other locks around my ilvl 586+ and noticed they were geming the same way. AskMrRobot has me going with hastw/mastery gems in red sockets as well. So many different things going on out there atm and it makes it kinda rough to pin point the best option lol.
Was gemed that way for demo but with the nerfs inc on reset figured I'd regem now and get ready to go destro again until things get figured out by Blizzard (lol).