Heck, if you don't want to run it during combat, you could throw in a Rings of Brighthearth and combo off with other cards. (And Rings is already solid with a number of your lands and other effects).
That also allows you to bring back fetches for the nuts Rings + Fetches plan.
Ah, good question. The cards are very, very similar, and my thoughts on them are basically the same. That is, the benefit of negating a single attack from a single opponent is not worth the opportunity cost of the card.
In the case of Maze of Ith, the opportunity cost is a non-land deckslot and a land-drop that doesn't produce a mana, throwing off the curve. In the case of Mystifying Maze, the opportunity cost is one of my very limited colorless-producing land deckslots and five mana to use (four to activate plus one for the Maze itself). Mystifying Maze also has the slight but not irrelevant downside of retriggering abilities in the time of "Enter the Battlefield: the Gathering" but it can't be used on my own stuff, which would make it more interesting.
I will update the Maze of Ith entry to make clear it applies to both cards.
Would Maze combo ala Argothian Elder make the card more worth it?
Heck, if you don't want to run it during combat, you could throw in a Rings of Brighthearth and combo off with other cards. (And Rings is already solid with a number of your lands and other effects).
That also allows you to bring back fetches for the nuts Rings + Fetches plan.
Would Maze combo ala Argothian Elder make the card more worth it?