Darkmoon Races Embiggen Druid

The new Darkmoon Races mini-set gave some great early-game tools for this N'zoth version of Embiggen Druid: Dreaming Drake and Crabrider. The gameplan is as you know it: ramp with Breath of Dreams and Overgrowth, make your guys big with Embiggen, smack your opponent in the face, finish with a big N'Zoth, God of the Deep. The weakest card in the list is certainly Imprisoned Satyr, any suggestions for replacements are very welcome. Some cards I considered are Injured Tol'vir, Darkmoon Dirigible, Animated Broomstick and Gyrocopter.