In my normal setting, doing praise/worship stuff, usually B or C depending on how many presets I need for the occasion. If the set is being done exactly as planned, it'll be C, with a MODX7. If there's some structure, but a little room for improvisation and I need to get to different sounds quickly, I'll do that with the MODX, but I'll bring along the RD-1000 as my main piano/EP sounds.
On a very rare occasion, I'll go with F, where we're calling out songs and just going with the flow, and I can get to different sounds as I need to. I haven't played a large rig in a while, but even though it's a ton of work to set up/tear down, it's quite fun watching audience reactions to a large rig, at least the audiences I play for.