Regarding adding moderators individually, you would have to do this anyway if you were adding them to a moderator usergroup. What I do is have the the Moderator usergroup configured with all of the forum moderation permissions I want my moderators to have. Then when I make someone a moderator, I go into the ACP, add them via Users > Moderators and when I do this I simply tick the option "Add Moderator to User Groups" and select the Moderator usergroup. No other permissions are added on this screen, just this option. Then when I save them they become a moderator and are added to the Moderator usergroup. In the future if they are no longer a moderator they are just deleted from the list which will both remove them as a moderator and take them out of the Moderator usergroup.