With cards that move counters around like Scholar of New Horizons or Goldberry, River-Daughter, you could even speed things up for a faster extra turn
Merry rewards artifact production with 1/1 lifelink tokens, which all of your token doublers interact with and the lifelink on those tokens assists with your life gain synergies
Alternatively, pack in a suite of second and third card draw payoffs like Morska, Undersea Sleuth
Its especially useful for Voltron decks, which can suffer terribly if their main threat is taken from them
That means when you next cast a spell that turn, you get to exile cards from the top of your library until you exile an instant or sorcery that costs less than the original one and then cast it for free
I get icky feelings just writing about it