Probably known already but 6B BE G 661K combos for 73 or traps both sides (not backwards but 66B hits backwards for 78) for 86. Timing is easier than 66A.
I added the 6B BE → 66A stuff to the combo sticky. I'm considering munging it into a more compact format in the future (something similar to what the Algol combo list does). Giant button/direction icons look great in the wiki but not so much for combo lists, where it makes it harder to Ctrl+F for a particular combo starter.