Well, you can do as you wish, but see it another way, you are a striker, and both defender are upstair. You'll have difficulty to keep the two monk away from you.
Yeah, he doesn't need both monk, but the ritual have been slowed down. With teh death cultist and the monk on our back, we gain many rounds before apocalypse. Another thing that make this combat a bit easier, it is they don't all enter the combat on first round. But that's also mean they need to think we leave them the time. Going down and going to full assault is exactly the best way to have them all on us at the same time, and for a TPK.