I played White Eldrazi at a 9-man event yesterday. Went 2-2, beating Landstill and Dredge, and losing to Mentor and Moon Stompy.
I'm learning that White Eldrazi absolutely follows the typical hatebears trajectory: it's capable of insane starts, but if your opponent answers what you're doing, you really struggle to catch back up. (For example, in game 3 against Mentor I lead with turn 1 THC, turn 2 Smasher. I got my opponent down to 4, but then he was able to Time Walk, Abrade the Thalia, and Plow the Smasher. From there he beat me down with double Snapcaster and Mana Crypt flips, and I could never draw/resolve anything to bail me out.)
With that in mind, I think I've gotta add Balance to the board, but I'm wondering if anyone has other suggestions for cards that can catch you back up from unfavorable positions? Palace Jailer comes to mind, though I'd prefer to avoid WW if I can.