Sorry for late reply bro
Since, u have 15 days and u want to visit only AJK so u should cover the whole area in detail.
Day 1: Reach Lahore
Day 2: Start with Lahore - Mir Pur AJK. Visit Mangla Dam and stay at Mir Pur.
Day 3: Continue to Kotli and then onwards to very famous hot springs of Tatta Pani ahead of Kotli. A bath is highly recommended there Then move onwards to Hajira and Khai Gala which will lead to Banjosa Lake and stay there at Banjosa.
Day 4: Go to Las Danna and then visit Toli Peer. On the opposite side of Las Danna is Haji Peer pass but i am not sure whether army will let u go there. If u get permission then visit Haji Peer pass as well. Then come to Bagh and stay there.
Day 5: Continue from Bagh towards Sudhan Gali and then Chikkar. On your way u will see Zalzal Lake. After Chikkar road continues towards Hattian Bala. Get DC NOCs here at Hattian Bala for Leepa Valley and continue towards Leepa Valley. Public transport is available till Reshian. There army will check NOCs and will let u pass through. Jeeps take passengers to Leepa Valley. Stay at Leepa
Day 6: Roam around the place. Visit Bara Hazari peak (jeep drive). Visit old multi-story local houses. Spend the day in wonderful fields of Leepa, Channian, Ghai Pura and Kappa Gali. Stay at Leepa or Channian.
Day 7: Check with locals whether public transport is available till Reshian from Mauji-Dao Khan route. If yes then u will be able to complete the full circle of Leepa Valley. Otherwise visit Mauji and the famous shrine there on LoC and come back from same route to Reshian. From Reshian, take public transport to Muzaffarabad. Visit the forts and city area. Stay at MZF.
Day 8: Early morning visit to Pir Chinasi and continue to Neelum Valley till Kutton. Stop at Dhani waterfall.
Day 9: Visit upper Jagran valley and continue to Keran. Visit upper Neelum village and stay at Keran.
Day 10: Continue to Sharda and visit the town across the river and ruins of fort and university. Continue to Kel and spend day there with a visit to Arang Kel.
Day 11: Visit Janwai, Sardari, halmat and Taobat and come back to Kel. It is a full day trip.
Day 12: Visit Shounter valley. Visit Sounter lake and shounter pass waterfall and return to Kel.
Day 13: Start return leg and stay at MZF.
Day 14: Visit Murree and Nathia Gali on return.
Day 15: Start return journey to Karachi.