No, the tach bounce, one tick when you switch ign on..bounce while crank,
rules out the switch and ignition for quick-diagnosis of intermittent
fail to starts, or warmed engine fail-to-starts.. not 100% but as a
roadmap in finding the problem. Meaning it would seem the spark is good,
time to check fuel delivery.

But that doesnt rule out the coil or plug wires... esp if this occurs on
damp days when engine cold.

Next thing to try is modifying fuel delivery while cranking:

Floor the accel while cranking delivers less gas through injectors..  
then
pump accel while cranking delivers more.

Do it in that order.

Sorry if you know that but amazingly to me, many dont.

NOW the issue is how it runs and idles once you get it started.