Gave Spiral a whirl at a little tournament recently. Can vouch for the Kiutaan as a legit unit. I feel the interaction with bombs is very powerful and turns the Kiutaan into two very distinct units. Typically found myself running it in marker going second or as a model with a bomb going first. I didn't even consider running two of them as Plan A. That would do a lot to offset the telegraphing of the strategy and deny them a denied flank strategy to avoid it.