Tahnnakai Temple Help

So i'm stuck on this mission, i can get through it find up until the second to last boss and there i end up having trouble and can't get past it.

Is there a best why to pull to not get overwhelmed or what henchmen or heros should i take?

Im a ritualist / whatever i feel like being but im not sure if i have a good build?

Or if anyone would be willing to help me complete this mission that would be super helpful

IGN: Liliana Spellstorm

I can help if you still need it. Is this in hard mode or normal mode?

About the next last boss, that should be the ritualist boss. I usually park heroes up stairs, spread out, while I go down stairs until they start moving, then rush back up. Foes will stop below stairs and can be pulled with a bow which makes them easier to handle.

Send me a PM when online as I'm usually difficult to find online otherwise.
IGN: Tomoko Mori