I tried line, I get a slight boost of volume and no difference in sound. Actually I'd say I can hear modulation better …
I have to say that using a looper pedal with the possibility to blend dry wet with the guitar signal, placing the modfactor before od's & distortion in killdry mode has transfigured the pedal.
If it can be from any help to anyone outthere, I don't have to make a couple of preset anymore like a chorus for clean and the same chorus for distortions or overdrive with a different intensity. Sounds are much more balanced and the blend is just around 50/50.
I wish it would just be a little less coloured / more transparent by the stompbox in the low freq range. You just loose a bit of precision and tone of the pickup for some mods.