Shinichiro Onishi sent me some links that I’m finding useful.
“If you want to increase combo techniques, these videos may be useful”
They are Japanese only, so most will probably just silence the volume. Not a deal breaker.
How to connect from a “triangle” 1-7
They build on each other, and a way to look “techy” even if you haven’t experimented with these ideas. There are ideas in a triangle that are somewhat subtle.