If you have MikroTik radios, use “set priority” action to 7 for OSPF traffic. If the radio is routing you can do that with a mangle rule, or if the radio is bridging you will need to do it with a bridge filter. That will prioritize it as long as you are using either NV2 or WMM. If you are using NV2 change to the 8 queue option instead of the default 2 queues.
Also, some people have had problems with BFD making OSPF less stable so be careful, see http://forum.mikrotik.com/t/bfd-ospf-ccr1036-issue/85182/1 for details.