@DannyTaylorThe answer is yes, We can create a multi-point PTP connection. I am not sure how far these sites are but we have several different external antenna's. I typically recommend backhauling on 5ghz and not even using the 2.4. We have a great CVD on this exact design your looking into, i have provided the link below.
As @PhilipDAth mentioned we do mesh, the benefit of this is it is built for resiliency not necessarily throughput. The APs will automatically connect with limited configuration on your part and dynamic fail over. The drawback is no matter what MCS rate your shooting for, your going to be capped around 200mbps in the most ideal setup (from my experience).
https://documentation.meraki.com/MR/Deployment_Guides/Mesh_Deployment_Guide_(CVD)#Point_to_multi-poi...