If XTG is easy then the solution is simple: bypass WTG and ATG and do 2 XTG passes on your neck, in opposite directions (S to N, then N to S) and that should do the trick. I have the same issue and it works like a charm

After time and practice (and a sharp razor ) you might find that WTG and XTG is all you need to get BBS across the majority of your face....