Just pls to mention of what:
-wireless radio;
-what type of antenna;
-how many km to p2p or p2mp
my recommendations are:
-just follow the documentation from Mikrotik documentation as well as search for nstreme in all forums;
-using 48v power supply
-(maybe) using combination of ap/ap-bridge with wds-station using static wds-mode, pls do not using station because of 802.11 limitation
one more thing, a lot of useful advice for your case to resolve in forum.mikrotik.com. I believe you will find in these forums.