I mean, is it viable outside of goblins? The fact that it is a gob does not change the fact that its ability is relevant to any deck that can pull it off. It can ramp you into a turn 2 JTMS or Karn for instance.
It seems craptacular as ramp unless you care that it's a Goblin or you abuse the fact that it's a cost reduction and play something many many times. My first thought was something like 2x Top + Prowess, but that fails in a variety of ways.