There is an other route available from ISB to RWK i.e. Khanna Bridge, neelore, Kotli Sattian, Malot Sattian, Arja and Rawlakot. Road condition is better than Azad Pattan route but the route from Murree and Kohala is the best as for as road condition and scenic beauty is concerened. Time taken is almost similar.
From Rwk to Mzd, you can take the route Rwk, Arja, Dheerkot, Kohala and Mzd. On other alternatives, the road conditions may not be to your liking. Depends on your ride too.
Regards.