I appreciate that unlike converge, domain just requires you to have the land types; a single triome does a lot for this card. And honestly, I love instant draw-2s, I love putting stuff in the graveyard. All that said, this is another one of those cards that I want to play, but not sure if it makes it. I think there are cases where you might just have only single basic type alongside painlands or pathways, making this a lot less impressive. That kind of variability leaves me a little worried and makes me want to look elsewhere for a comparable effect.
I added a domain package with the triomes in my DMU update, and it's been working out really well. Shadow Prophecy has been a big hit too, being instant speed and fueling the graveyard makes it a lot more flexible than Painful Truths. With domain count at 4 or 5, this is essentially a 3 mana Fact or Fiction / Memory Deluge type card, which is extremely powerful at 3 mana. I highly recommend for anybody running Triomes to try this out.