Trying a slightly modified version of Christian Calcano's esper control deck.
Thinking of switching in gideon for elspeth . . . . thoughts?
I like Gideon but he doesn't protect himself at all when he comes down. Same with Ashiok and Jace to a lesser extent (at least he gives you cards that you can then use to protect him).
Elspeth's +1 ability seems crucial for a control deck, and the cheap board wipe ability she has is way easier to get off than Gideon's -15.
Overall I think you could try it for fun, but I think Elspeth is probably just better overall imo.
I say switch aishok for gideon, at least thats what I play in my esper deck. Although I don't have sphinx's revelation or Jace, so my esper is really strange. I use ephara with elspeth for digging out cards and I alsorun opportunities. But the point of my deck is to board wipe and swing out. So thats why ephara fits, I also run haunted platemail, mutavault, and Gideon of course.
Truth be told if I had $100 to blow on jace's and Sphinx's I would 100% change my deck up haha.