happy+box/grampa

Step 1. Activate Doll Happiness, add to your hand either Box of Friends or Grampa Demetto
Step 2. Activate Doll Happiness' effect, destroy Box of Friends and send to the GY either one of the Doll monsters
Step 3. Activate Box of friends' effect, summon 2 Doll monsters
Step 4. XYZ Summon Princess Cologne using the two Doll monsters as XYZ materials
Step 5. Activate Princess Cologne's effect, special summon Box of Friends from the GY
Step 6. Normal Summon Grampa Demetto
Step 7. Activate Grampa Demetto's effect, detach one material from Princess Cologne and special summon 2 Dolls monsters
Step 8. XYZ Summon the Rank 1 using Grampa Demetto and Box of Friends as XYZ materials
Step 9. XYZ Summon the Rank 8 usnig the two Doll monsters as XYZ materials