I think this skill should rez your animal if it is dead like comfort animal does. I have no incentive to bring this skill as a pet healing skill if it does nothing for my dead pet, because then I would need comfort animal to revive it. Putting in this minor feature might make this skill worth using in my opinion.
{E} Heal As One (Attribute: Beast Mastery)
If you or your animal companion are below 75% Health, you both gain 25..121..153 Health.
Energy:5 Cast:1 Recharge:12
A
