I think I'll main them ahead of Hymn because I tended to use Hymn to flush out the last couple of cards out of my opponents hands anyway and after the 1st turn when your opponent is down to 5 maybe 4 cards having to discard 2 is still pretty crushing plus I think with the sinkholes it'll be better espescially if the discard lands only to be hit by the sinkhole after.
hows your prep going got anything in mind wasn't it Dark Depths you were looking at last (if so I really think you should because it looks like it could be Awsome!)
could you put DD into an Eva green shell? heavy discard living wish for the second part and smash early? haven't seen much of the deck to know if people have doing that ahead of the U/B versions.
Ed