Yup, I agree it's situational, though my initial thoughts were for GSZ to replace the redundancy of Fyndhorn Elves with something that, when paired with Dryad Arbor, would allow for the turn 1 accelerant that having 8 llanowars wants to accomplish and yet would allow for versatility and combo piece fetching after turn 1. The turn 1 play is obviously something that Pact can't do because of it's drawback.
I think you meant Pact when you said Living Wish here since Wish adds G1 to a creature's casting cost instead of GSZ's G. Also note that I wanted to add this to Neil's list with wishes, in addition to the 3 Living Wishes and 3 summoner's Pact. I agree with Infinitium:Quote:
The far as Combo Elves without NO/Pro, I would say that Living Wish is the better card since the deck is more geared towards efficient and hyper-low curve for combing. GSZ is immediately recognized as having tons of potential in NO/Pro builds for the reason that it does accelerate you into turn 3 Natural Order.
"That, and it's the better card by far compared to summoners pact when not comboing since it can act as an early accelerant and actually allows you to tutor for relevant cards in advance rather than at the last opportune moment. Also, doesn't lose the game by default should the opponent be aböe to answer it."

