Originally Posted by
Bootynuzzler
Most ilvl upgrades will take priority over secondary stat allocations due to the higher priority stat; in this case, strength. For gear acquired with an ilvl identical to your equipped item, Haste is still your best secondary stat with Versatility being approximately equal but slightly behind, and Mastery and Crit following the same principal, respectively.
That said, the above commenter is mostly correct. You don't want to only stack Haste and Versatility and leave yourself with a pathetic amount of Mastery and Crit, so simming potential upgrades is highly recommended.
Don't throw away any gear either. For example you may replace a 184 item with another 184 item that sims better. Later on you get another item with completely different stat allocations and suddenly that 184 item you had replaced before sims better.