Brake lights and dome light fuse keeps blowing

I had the same issue but mine turned out to be the switch on the brake pedal.

Somehow the switch got bumped over just enough for it it short itself out. Unplugged the switch and replaced the fuse, moved the switch over a bit and problem solved.

I too am running LED Taillights bulbs and an LED flasher that was recommended by @slantsixdan

No more hyper flashing or any other issues.