You may want to consider some solutions to lags, it's not the server it's the goddamn version of warcraft that they made such a good job at it. Look below:
1.
Go to registry (Run>regedit.exe) to this : HKEY_CURRENT_USER\Software\Blizzard Entertainment\Warcraft III\Video and change Lockfb to 0
2. Use native fullscreen. (and also visit
HERE )
3. If you tell me the operating system, I can provide more information.