True, the problem is that Vulture is usually on Crowling's team! And Other cards available for Life with these abilities, like Parasityc and Cave Slug are slow and take a lot of mana. Besides all of them only get Scavenger at level 6.
Triage could also be interesting to regenerate wounds from thorns, but I can rarely fit the Herbalist into the team, besides that he also only has Triage at level 8.