I always try to activate all the summits within a specific region. I define these regions for myself based on geological or geographical boundaries — or I bound it with a highway or a river.
From May 29th to June 2nd, I will be activating the 13 remaining summits in the Haut-Doubs region (F/JU-XXX) that I have yet to complete.
Perhaps there will be something of interest there for you …
The Swiss summits will have their turn another time. 
73 Armin