For the record, triple burn Omnigul is still the most horrible experience for a nightfall, especially being locked in the chamber with her, but this one... this one pushes second pretty closely behind the Wretched Eye.
We got Arc burn AND Exposure for Septiks Perfected. fortunately we also have lots and lots of grenades due to catapult.
Recommendations for this:
Bring any arc guns you have, but be coordinated about your strategies ahead of time as the adds will be hitting like trucks on this strike for the most part. Titans? Being a striker means running a solid combination of armor AND recovery since it can help when making/picking up orbs replenish health in a pinch.
Otherwise, the catapult perk means grenades on our void bubbles will be useful for area lockdown. Another thing to consider is also weapons for a quick finish at the end.
Hunters recommended to run any armor which helps with recovery. Seriously. Most enemies WILL die, but the concentrated enemies in a given area for the last fight can and will reduce those shields to nil quickly. Be cautious and run nightstalker to help quarantine adds.
Warlocks- With exposure, it can be tricky, but confident warlocks? Feel free to run your stormtrance with increased super energy when allies are nearby.
Otherwise, self rez will give you a full shield and exposure means increased shields as well. Again, with catapult? You can easily make up damage output with strong grenade presence as well as area denial during the final fight.
Good luck and happy hunting Guardians.