Best Method for Routing Multiple Fixed Public IP Addresses

I’m new to RouterOS. I have point A that will be getting FIOS, along with a block of 5 fixed IP address. I’m going to be beaming (via WiFi) one connection to point B, while providing limited access to a LAN at Point A. The router will be located at Point A.

Here’s what I want to do:
Ether1 - be the gateway to FIOS.
Ether2 - Local interface with DHCP server. possibly use NAT. Can only access Ether1 and public IP address block
Ether3 - WiFi Link to Point B, with fixed IP addresses being routed to Point B as well. Can only access Ether1

What would be the best way to configure the router to do this?