Finalizing my 4-day itinerary in Ortisei (Dolomites)
 

Thanks to the useful advice you've given me, I've just about finalized my itinerary in Ortisei in July this year.

Day 0: Arrive
Day 1: Seceda to Pieralongia Loop (or to Col Raiser)
Day 2: Trail of the Witches (Bullaccia/Puflatsch)
Day 3: Adolf Munkel Trail (walk from Ortisei, bus back)
Day 4: Sella Group by bus (no hiking) & Sassolungo Group Hike
Day 5: Depart

Questions
-Do you recommend making any changes? I plan on not renting a car, but I can easily be swayed.
-Do you think it's necessary to add in the hike near the Sassolungo group (in red)?
-If so, can you suggest a short hike?
-Should I combine Day 1 & 3 (you can walk over the ridge near Seceda to Val di Funes) and separate day 4?