Yes, the good ol' Dk controversy again

First of all, why the heck would you have a Spear out at Himes?
Unless you're too lazy to open up your inventory to equip your polearm, or don't have one, you should be using one.

I grinded my way through more than twenty-five levels at Himes without switching my 119 FairFrozen out for my 117 Zedbug.

...of course, I was still maxing Pole Arm Fury during much of those levels, but that's irrelevant.

FYI FA is pretty much garnish on 2nd job. You won't train faster, unless getting it motivates you. It actually reduces damage on the mobs you should be training on, I'd consider skipping it on even a pure weapon Spearman (unless like Polearm Crusher, you just want it for the looks).

Not necessarily.

As a 1.5 Hybrid DK, the extra attack from FA helped me immensely as I pounded my way through 6x at Coolies.