When World Boss Spawn and you Joined, then you fell it's lagging?
Well here's a way to less the lag, # Just ON Hide Players#
Example: Too much players in a map causes LAG
# Just turn on Hide Players#
-Just click the Helmet Button beside the chat box
these was, very helpful post thank you for showing me how to show hero back
You can also disable the Skill FX and Weather FX, by doing this go
Settings> Gameplay> Show Skill FX (OFF) and Weather FX (OFF)