I wish I could help, but this is only my second year with pixels and xLights and my first year with any songs. Only this week did I choose 2 songs to sequence and haven't really done any work yet. Yes, I'm stressed out! Also just put in an order with Ray Wu this morning, so that's tight timing too!
Anyway, I assumed I would start with the tedious like you guys mentioned, then use a lot of copy and paste. The songs are repetitious, why wouldn't the lights be repetitious too? So sorry I wasn't much help, but certainly going to keep tuned to this thread in case there is something I can learn. Good luck!