DRG perspective :

The Balance
I will take this anytime, anywhere, especially during my opening burst.

The Bole
Mainly for tank, but maybe turn into AoE if you know a lot of AoE damage is incoming.

The Arrow
I like having TP and also would prefer not to throw my rotation timings off too much, so I think this has more value for a BLM or WM BRD.

The Spear
Would be awesome as long as it works as described. If it reduces my Cooldown times, I will love you.

The Ewer
Don't care. Next.

The Spire
We chug TP now at 60, so I would gladly take this even outside of an AoE burn.