Crushing things with comets ? are you madman ? Why would you do that when you have 70 range infantry vaporiser (20 munny phosporus). Also comet is expensive for risking it.
That is the fun part, vaporize the at gun with 20 muni phosphurektus, then proceed to crush infantry and drive away from it with your speed while shooting with laser guided accuracy at tanks etc. It is risky yeah, I might have lost a comet or two whilst doing that.