There really isn't a great deal of point to "highest score" replays without a total matchframe limit. For example, I got well over four million damage not long after I started playing by just continually zombie-hitting Uke with my arm.
"Call yourself alive? I promise you you'll be deafened by dust falling on the furniture,
you'll feel your eyebrows turning to two gashes, and your shoulder blades will ache for want of wings."