Bumping this! I have a very similar issue. Both coils are dead, and flippers are dead as well. Good to know they are related. I tested that fuse and remember it being good but after seeing this I'm going to test it again. I will let you know if I discover anything...

So I fixed my issue. It was a weak connector on the flipper power board (lower connector with black/yellow wires coming directly from the transformer).

The 2 high powered solenoids (the kickback and left ramp kickout) are controlled by a relay. The solenoid driver transistors on the CPU activates the relay instead of the coil itself and the high power piggy backing off of the flipper voltage flows to the coil for a hot second before the relay deactivates.

Do you have another flipper power board you can put it and play on for a while to see if the fuse blows? If not I would test the diodes on the flippers and clean the EOS switches. Also, I would change the fuses back to factory specs so as to not damage any other components.

Here's a good walkthrough on testing flippers to check for odd resistances/voltages on the diodes and coils. If something is out of spec it could be the cause, especially since you are experiencing intermittent fuse blowing:
http://techniek.flipperwinkel.nl/wms11/index2.htm#flip0