with the proper classes and properlly assisting wars shouldnt have the issue either.
I never had the issue either... until T7. Proper assisting has nothing to do with the threat roll over in later levels.
The threat rollover adds to the challenge. Without it all fights would be /attack on /afk.
There are plenty of items in game that help mitigate the rollover. I do not think we need any more items and or any more changes to try to mitigate threat. We are good to go as is.
