There are still key combos that I could tap out with lightning speed on my old keyboard that I still struggle to type as fast: C-M-- (negative argument) followe

There are still key combos that I could tap out with lightning speed on my old keyboard that I still struggle to type as fast: C-M-- (negative argument) followed by another key, such as C-M-k, is one such example. I wish I had more keys, yet ironically I have empty keys I do not use at all on the keyboard. Stick those sequences on those empty keys as macros. Or assign one of those empty keys to control-meta.