Quick and to the point:
• Overpower is proc'd
• Mortal Strike is off CD
Do you ...
a) Mortal Strike immediately, wasting an Overpower proc but keeping MS on cd
b) Spend Overpower procs and then MS once Overpower is disabled
It's hard to find good guides for Arms so far. Based on how Fury plays, I'm assuming keeping MS on cd is top priority, but it just feels really weird/bad to "waste" a free Overpower by MS'ing when Overpower is already proc'd.
Second: Rage dumping. Fury tries to empty its Rage bar during CSmash windows by spamming HStrike alongside GCD abilities.
As Arms, I'm not sure what is more important...
a) Accumulating Taste for Blood charges (don't spam low-TFB HStrikes during CSmash)
b) Dumping as much Rage as possible during CSmash (so ignore TFB and spam HStrike regardless of stacks during CSmash)