For dorsal augmentation during Asian rhinoplasty, there are many different options including using your own tissue or using synthetic implants. Autologous grafts have the advantage of providing permanent results in a safe, predictable manner. Synthetic grafts can produce acceptable results temporarily, but will not yield a permanent result.
Yes, Don, you will need nasal bone fractures to narrow the boney pyramid. From the side view, you have a cartilaginous bump that needs to be taken down before an implant is inserted. How narrow do you want your nose. maybe an implant is unnecesarry.
You would benefit from dorsal augmentation and maneuvers to revive your tip such as grafting. I am not convinced you need osteotomies or alar reduction.