There are a few I believe CTF and conpvp, I'm sure if you did a search on Runuo you would find a couple which might be what your looking for , not sure how updated they are
something that runs like hourly pvp like how pandora has it believe Voxpire made it but a arena u type a command to join and it will move u to wait area in arena and select random players from the wait area to do 1v1s or something around that nature
I know that System, but i guess Voxpire never published it.It´s a freaking amazing System (like all from Voxpire´s Systems) with a whole dynamic setup.All you can do is ask Voxpire privately about.