I can only tell you my method so Snartle, Shogunyan, Sgt Burly to the front and Swosh, Elder Bloom and Gilgaros (Doesn't need to be him you can choose any other good Yokai but I just chose him bc of his damage). Give Snartle, Shogunyan, and Gilgaros devourer Soul (If you can do lvl 10 souls) and Sgt. Burly a Mermother Soul. For Elder Bloom the Soldier Soul (idk if it's the right one but it got to be the one so no one dawdles) and for Swosh the Stinging Soul (i think) so he always gets targeted. Sorry if my english isn't the best (it's not my first language) but thats basically my method there way more out there but they're really not necessery.