I'm not there yet either, but was looking at Nature's Vigil from the reverse perspective.
Having healing, during DPS, by a round-robin of Nature's Vigil... most likely with 2-3 presses at a time, during any burst phase.

I was also looking at the possibility of some Ferals taking Heart of the Wild too.
Both to have 1-2 Tank options and some healing for them (for the 45 second window), for the Generals in AV/IoC.

Not sure which option is better, and am definitely curious on how Nature's Vigil performs.