Here's some mods that I think will be good for da server.
Provides maps of explored terrain that can also be used to place waypoints and other useful information.
Allows to build AI armies that can wage war on a realistic scale. Can also be used for life in villages and can be used as bards, traders, guards, etc.
Allows the use to freely move ships and air balloons around without any restriction.
Shows and MMO style of damage and health indicators.
Allows more rich GUI to be used.