It's the best strategy IMO. Control the race with Slovenia without going too hard and then create chaos after Mount Kigali with multiple attacks to isolate Pogacar.Now wait for this humiliation to give Evenepoel hope and confidence that he can beat Pogacar in 1 on 1 battle, making Belgium help Slovenia control the race....
If they are expecting to leave the race control just to Slovenia, they are dumb. Even if you put Cian in the front, do you really think he can win?