Hello there, I have been working on the lag and trying my best to lower it as much as I can. It seams to be mainly coming from the new Particles like BigSoulWell, FlameWheel, ect. I have added a range on the particles now so if there is someone 25 block from the Location the particle will turn on. Other wise it stays off. This should lessen the lag since the particles are not running 24/7 now. I have also fixed a bug with that was reported about CraftBukkit 1.8.3. This has been fixed that I am aware of. Please leave your feed back about the lag. Have a nice Day <3.