S4 Series2 Lustr+ - Fading in different LED modes

Hello, I've been wondering which LED mode I should have my S4's in. Usually I have been using the Standard mode. The downside to that is that my fixtures cannot snap to 0% in an instant. There is a bit of fade when they're snapped to 0% and that results in all my x7 engine fixtures snapping out some 100ms later than the rest of my rig.

I tried yesterday to put them in the Quick mode, but that resulting in horrible stepping in the dimming and I don't see why anyone would like that mode. 

So, what mode is best for snappy blackouts and smooth dimming at the same time?