Assassination rogue- mastery or crit?

[Despesorio 0]

Which is preferred?

 

EDIT: This is assuming PvE

Edited November 20, 2014 by Despesorio

[Carrn 284]

Mastery is valued at 3.28 and Crit at 3.19

 

In other words, they're pretty close, but Mastery is slightly ahead. That said though, you should probably still have some Crit, although I'm not sure exactly what the balance would be. My guess would be around 30% or 40%, but I don't know if that's reachable before Highmaul opens