Shinichiro Onishi sent me some links that I’m finding useful.
info@yoyoeducation.jp
“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.