I had someone tell me it was the number of arrows you fired in the fight. Fail!

I dunno why people don't use multishot during longer fights that would survive past multishot-->booooooost->BAM->ws->ws.

The TP and damage math justifies the stamina cost if even a single attack boost (blindside, raging strike, ferocity series) is up. If more than one is up, it's a no-brainer. Doubly so for trifurcate.

In fights, I'm either multishotting or trifurcating as fast as raging II and ferocity II come up, plus or minus hawk's eye, then weaponskilling in between. You just can't beat the damage, and stamina's not a big deal. You can let it regen while you're blowing the two weaponskills. Just don't use shrieker or something crazy.