I dont think JTMS is for Delver. You will just be trying to play a long game with sub optimal cards when you don't have Jace. Legacy Delver decks have always had access to JTMS and never played him.
I think we actually go the other way and make the deck more low to the ground as creatures with haste are good against him.
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I think we actually go the other way and make the deck more low to the ground as creatures with haste are good against him.