Arrow recovery really depends on how anal you are about the arrow supply. Doing what I'm doing and buying up every raw arrow material in the game every restock I probably have way more arrows than I could actually use even without Recovery. Still, I'm going to such lengths already to accumulate I'm not going to say no to a talent that functionally gives me even more arrows.
Elemental ranger only procs on regular attacks, not special arrows or skills. On the one hand that means the skill doesn't really add up to that big a damage boost, but on the other it's basically "free" damage, plus you have the ability to prevent it from occurring when the enemy is on a healing surface.
And I will admit that my ranger (with stench) takes little enough damage that I could PROBABLY get away with GC, especially if I'm not averse to resurrecting her once in a while. It's just that it seems a pretty high cost for 4ap, something to only be chosen if you are really absolutely sure you don't need the HP rather than as a generic offensive boost.
