I do use the scything motion but what I'm also trying to develop (with less bloodshed) is a diagonal motion.

xxxxxx
_xxxxxx
__xxxxxx
___xxxxxx

In other words, move down while at the same time moving across.

That area under my chin and jaw line determine which straight razors work for me and which ones don't.

With DE razors, the Merkur Slant gets the problem areas best. The safety bar bends downward from one end to the other and the blade seems to rest a little diagonally as well.