Grinch

I would expect one coil to break down but not 2, though just swap the round to check. The front coil also drives the rev counter, so if that's not moving when it starts it shows the front is dead.
I would check that your choke cable hasn't snapped and is over choking the bike.

Another thing it could be is the starter relay switch breaking down, it has a little tab of metal that runs the live to the 30amp fuse, though I would expect this to drop load if you turn the lights and stuff on. You know its going as it turns a nice corroded green.