If you think you can attempt even Caduceus in Duty Finder, you have another thing coming. Coil requires more communication (especially turns 2 and 4) than any other thing in this game by far. It's on a whole different level than Titan HM. And you want to use a DUTY FINDER to go in with 7 randoms? Are you nuts? Even assuming you get a good party makeup (and yes, some turns DO require certain classes be brought, at least as a 1-of), how are you going to communicate properly with everyone to actually do things like trade tank aggro in turn 2, organize the pulling of slimes to Caduceus/splitting Cad, or the hell that turn 4 can be? You know nothing Jon Snow.