Actually, she was the first to file in that contest. I'm hoping Taff comes in a distant 3rd.
Doesn't matter when she entered. If Kobach is the one with the greater likelihood of winning, Lightner is the spoiler.
We have to be realistic. The "first in line" principle has often spelled trouble for the GOP -- it was certainly Bob Dole's "turn" in 1996, but he was a lousy candidate.
If Taff is really about as good as the others, then there's no spoiler at all, and may the best campaign win. But if there's a significant ideological difference, there is no valid excuse for two conservative candidates.