Dream-Devouring Siltcurrent.

[Martian Patriot]

So...I don't have precognition and didn't build a party specifically to fight this guy going into the dungeon. I have:
-Spicebush Yi Sang
-Seven Faust
-Cinq Don
-Seven Ryoshu
-R Corp Muer
-K Corp Hong Lu
-Seven Heath
-Molar Ish
-Dieci Rodion
-One who shall grip Sinclair [Support]
-Seven Outis
-Zwei Gregor
How do I make this work? Because I've already tried a solid 5 times but my party got wiped by Blind Obsession every time :/