JMHO, stop replacing and start testing.
Often a part is changed that's not needed, that's where testing comes in.

Get a volt meter and test for voltage at your coil (a cheap volt meter will work). My hunch is you have blown a fuse or fuse link wire to your ignition or coil.
Use a volt meter and work backwards from the coil towards the ignition switch, from there to the fuse box/power connection (exc.).

TEST, TEST, TEST. Replace LESS, LESS, LESS. your wallet will like it too.