(MoP Heroics/LFR) - 3 DPS - Locks or Mages ?

[Flight]

Looking for 3 DPS to play just the three of them in lvl 90 LFR and to 5 box with a tank and healer in Heroics.


Haven't played for a few years so not sure where things are at atm. So the question is 3 Mages or 3 Locks ?

Main concern is how much DPS is dependent on procs and how easy this is to manage while boxing when spamming rotations across multiple characters.



All advice appreciated.