Moon Druid/Astral Arms Monk

[Quietus]

I was under the same impression initially, but as elyktsorb correctly pointed out, a Moon Druid has the ability to Wild Shape as an Action or a Bonus Action. All Druids can Wild Shape as an Action. Moon Druids gain the additional ability via Combat Wild Shape to Wild Shape as a Bonus Action, but they do not lose their base Druid ability to Wild Shape as an Action.

Therefore, you could both Wild Shape (Action) and activate Astral Arms (Bonus Action) in one turn. In addition, since activating your Astral Arms triggers a 10' AoE damage effect, you still have the ability to deal at least some damage that turn when activating both Wild Shape and Astral Arms.

So your contribution on round 1 (the most important round) is going to be entirely encapsulated in that 10' AoE damage, and a tiny hp buffer for yourself? Personally, that doesn't sound satisfying.