In multiplayer, with rivals and enemies all around you, you will find it necessary to build and defend a fortress. There are useful tutorials for PVP bases and other building styles on the Minecraft Wiki. Click on this link to view the tutorials page: Middle-Earth Gameplay Guide. However, there are some aspects of the mod that are not covered in vanilla Minecraft, such as the use of hired units and unique blocks and weaponry. Thus, various other suggestions are made on this page. If you're interested in adding traps to your fort, a page about this can be found here.