Yup, just go with 2 combo points and use engulf. That gives you 10 seconds to do the next engulf and you only need 8-9 (depending whether you're using revivify or not).

When I first proposed doing it without shielding we went 3-1-1-2, but lately some of us are skipping the revivify going 1-1-2 and we don't seem to die cause of it. The overall damage with 1-1-2 seems about 15-20% higher then 3-1-1-2 rotation.