#8 is test for working CDI. Noid light should show ignition trigger pulses from CDI to coil.
Even better is oscilloscope trace because it would show voltage-levels.
Of course, pulsing at coil requires that coil is actually getting power. Hence need for test #4. Perfectly good coil and CDI will not generate any spark if there's no power at coil. So first thing after good battery is to test that battery power is actually getting to coil (could be ignition-switch, kill-switch and other wiring if not).