Yeah, Grabbix can be inconsistent, though it's fast when it does go off. That does seem like quite a bit of bad luck though.
Try one of these:
Mono-death (Pillars, poison, mummies, dragons, Arsenics)
Mono-life (Pillars, frogs, cockatrices, adrenalines)
Mono-earth (Earth pillars, Mark of Time, graboids, shriekers)
Mono-time (Pillars, ghosts, precogs, dragons)
Novabow (4-5x quantum pillars, novas, up to 2 cheap cards from each element)