[Cunning Drift] would maybe be advisable over [Coaction Drift], but I saved myself a Forma.

If you're not as keen to let the pets do the heavy lifting, consider a different Aura. Physique would be my fallback but nothing really stands out as must-have. [Corrosive Projection] has a different polarity, so that would be an Aura Forma (or stock Forma, if you're daft) to fit.

Well of Life is preferred over options such as Blood Alter. Blood Alter cannot impale enemies caught in the Stangledome. Blood Alter also cannot be pressed again to end the effect, which can mean standing around waiting for it's longer duration to expire before moving to another round can begin.

I'm using a [Hunter Munitions] [Kuva Tonkor] build to accelerate death inside the Strangledome, but any of the OP AoE Slash spreaders will do the trick.