I haven't put a ton of thought into this, but as I was reading through some of the posts that asked for a DoL/DoH raid/dungeon I came up with an idea that could work as PvE or PvP. I'm calling it Castle Seige. Basically it would require the DoL and DoH to work together to either stop a Castle Seige or complete one. They could base the requirements on the classes that are involved (pair botanist with carpenter/weaver/etc, miner with smithing/etc.) In the scenario the DoL would have to gather the materials for the DoH to craft into materials for NPCs to use in the Siege (you could use items that you can find outside of instance or just make up new ones) I like the idea of miners gathering ore and smiths making cannon balls and BOT gathering wood for carpenters making arrows or ladders, alc making bombs and poison (use your imagination), heck, you could even have fishers catch sharks for a moat. You could make it on a timer or just progress until there is a victor.