Oh shucks ! I was going to try to start helping by working from the fuel angle, but you've eliminated that source. On the other hand, if the powertrain relay (R13) quit working, it would shutdown the operation of all your coils and injectors. If you think that (that's) a possibility here, you could try a swap with R9 (windshield wiper Hi). They look to be the same size and probably the same p/n.
Its an easy T/S item you can try. They are in the underhood fuse box.