Oh oh oooh you have a Splinter going into a Carcosa, those two are the first pedals on top of my wishlist right now! How do they sound stacked? I want to get fat doom tones out of them, going into an Orange style slightly dirty amp.
I don't usually stack them. I use the switch blade to either have an OD with fuzz/splinter in parallel, or I run the splinter into the plumes in series.