Feldon Raid Zone Lag can add randomness to an already challenging fight. There are many causes such as how an encounter is designed, unintended interactions in the zone code itself, etc. This issue is of particular importance in Velious because the Tower of Frozen Shadow x2 raid zone drops a Clicky item which is required to take on most of the Velious x4 raid content. Players receive an item which must be clicked by certain classes at certain times in certain named fights in Velious hard mode raid zones in order to make them defeatable.
Although some guilds have been unable to progress due to lag specific to certain zones/encounters, compounding a consistent level of lag already present on their server (Unrest, etc.) I have received word that guilds on every server have managed to get these items, albeit with a lot of extra runs and some luck.
That said, while we wait for new server hardware, Rothgar and his team have been working on fixing specific issues within the raid zones to reduce lag:
All Velious raid zones should be running much better from now on. We’ve also found a few other performance improvements today that should hopefully make it out next week.
We are focusing very hard on performance along with the features for GU60.
added another quote:
Please do try the zones again and let us know how its working for you. We do have plans in place to resolve issues like these and we were able to make some changes last night without taking the servers down that should have helped tremendously.
We have additional plans in place to improve server performance even more over the next few weeks and months.