[Autumn]

Uhh, Stand Off/Weir Konnen were a part of the additive DR turned multiplicative, its still 20%, however the amount you receive is reduced by your DR percentage exactly as if they worked like Ogata Waraji/Weathered Body.

So at 50% Phys.DEF, if you received 10% DR from Weir Konnen or Stand Off, you would instead receive 5%.

Conversely at 20% DR you would receive about 8% DR instead.

you'll notice that Wolf Warpaint functions this way too.