Vue: how many ct clamps will I need?

I’m close to purchasing a Vue to replace my sad Sense unit. I only want to monitor 240 volt circuits and solar, and was assuming, based on earlier guidance, that one clamp per circuit (values doubled in the app) would be sufficient. I thought I just read that current thinking (no pun intended) is to have one clamp per wire, and join the two in the app.

Will either approach work? I don’t have a lot of space in the box.