[Draenin]

It might be a good idea to reduce the number of emitters placed around the screen, as well as speed up the raindrop splashes. The more quickly each particle is destroyed, the less laggy it will be.

Also, sometimes particles tend to build up, making big walls near the edge of the screen. While this doesn't always happen, it does result in a greater amount of on-screen objects, which, given the right circumstances may cause crashes with the client.