Stop reading my mind.
That said, I'm not sure if it's feasible. There are no debuffs in water R tier & Joan(Sniper) seems a must to be able to survive Crom herself, even if you somehow get yourself through the mobs. But hey.. I got 2 more days to test around this week. The worst that can happen is that I miserably fail (like I did with Amaru rag mission) & call it a day.