Using a White Spirit to increase the Black Knight skill 'Forced Move''s rank to six doesn't increase the range of the technique. It's scaling suggests that it should (3/4/4/5/5) in much the same way as Hanging's.
Is this intentional? If so, consider this a suggestion topic to make the change.
It won't increase the range but it does increase the slow iirc.
its scaling actually suggests
3/4/4/5/5/5/6/6/6/6/7/7/7/7/7
Lolzytripd is accurate on that, but I also don't see why not increase the range with a White Spirit.
The same argument can always be used in every situation involving this: "Blah blah White Spirit means you're possessed, which means any Holy-enchanted weapon will drill through you, super tank BK or not." And I'm certain with it.
It's the way the skill is programmed, if you want to make a suggestion to change it, go right ahead.