It may be possible to replace delver with Scythe Tiger since your cmc is that low, you lose the flying however; if you'd wanna try it out.

Would Thespian's Stage be too slow for this deck? It's another way to get Marit Lage out faster.

Deckologist I don't see how Thespian's Stage would make things faster. Could you explain it to me? I feel like it's a weaker Vesuva in this deck. Also for protection if someone Path to Exile Marit Lage or something like that I have Crucible of Worlds for backup if that's what you meant.

THis was taken from the Tappedout Rules QandA forum.

If you activate Thespian's Stage 's ability targeting Dark Depths , Thespian's Stage becomes a Dark Depths with the ability "2, T: ~ becomes a copy of target land and gains this ability." The Thespian's Stage copy does not have any ice counters on it.

SBAs then check, and you are forced to put one Dark Depths into its owner's graveyard. You choose which one. You should choose the one that has ice counters on it.

Then, triggered abilities are handled. The state-based trigger of the Thespian's Stage /Dark Depths is put onto the stack because the land has no ice counters on it. The land will be sacrificed, and you will get your token.

essentially it says with both of those lands out "pay 2 mana sacrifice both lands get Marit Lage

Deckologist That's pretty good! Thanks for that suggestion I'm definitely going to try it out as soon as I get a copy.