Life's Finale is also an enabler for a quicker kill - Delay a creature spell, then search your opponent's library for that creature. Then Dwarven Shrine deals 6 damage every 3 turns. 12 damage if you have 2 Shrines out, which is likely late game.
Dralnu, Lich Lord - Allows us to use all of our spells again, and sort-of negates the Dwarven Shrine damage that I might self-inflict by getting rid of graveyard spells.
I've put some other ideas I had in the Sideboard. Grim Lavamancer seemed like a good play to get rid of some of my spells that could cause self-inflicted Dwarven Shrine harm. Jester's Scepter seemed interesting but perhaps too clunky, and same with Praetor's Grasp. I've listed some other instants that I thought about putting in for the Scepter package, but ultimately cut.
I'd love to hear your thoughts on how to make Dwarven Shrine shine even more. Obviously this deck does best when the opponent is playing 4-of's, but it still can win via Scepter damage if your opponent is not.