My awareness will jump to the next-as-good clone of my original mental pattern. Whoever had the most similar memories to what my original brain had before it died, that's whose body and brain and memories I will experience after the death of my original brain.

More likely (if the universe or multiverse is infinite or at least big enough) it will "jump" to a clone of yours who survived or has just been resurrected by someone, reincarnated as a Boltzmann brain, and so forth. Personally I find this quite disturbing, but not really an argument against patternism.