A server for testing strat tactics and maps. With a full rotation of all the city and castle maps: so bugs can be found and rooted out!
But mostly for training. Unlike siege it doesn't have a cap point, instead both sides are issued with tickets. Use the battle roster system to be able to pre-alocate players and teams and boost team play.
Gear pools are allocated, just like in strat. Perhaps have some one update the attacking sides gear pool every few days. Have the defending castles/towns just use the current NPC gear arrangement.
I think it would be great to be able to practice. And strat is just so much more tactical than both siege and battle.
Grey Order had a hell of a time at Praven and it wreaked of inexperience and lack of organisation.
The Nord defence of Kitten Fortress has been, from what I've seen has worked thus far very well organised, but I do fear for our poor kitten over lords.
I would love to see a coordinated well executed assault, with towers and catapults and the right shock troops pouring onto the walls before the clean up crew settle in for good old fashioned spawn rape.
EDIT:
I would like to add that the final assult on Praven by the Greys was tactical and very well done.
Congratulations Greys