Issue Description:

When XP Obelisk has more then 2500 level, server tps lag goes extremely and pretty such shuts it down. with mob farms its quite easy to achieve.

Suggestion?:

is there a way to put an exp cap on each obelisk to say level 1000 or 1500?

Steps to reproduce:

1. make mob farm
   2.use Vaccum XP hoppers
   3.channel liquid XP into ender tank or directly into obelisk
   ...

Affected Versions (Do not use "latest"):

• EnderIO: EnderIO-1.10.2-3.1.193
• EnderCore: EnderCore-1.10.2-0.4.1.66-beta.jar
• Minecraft: 1.10.2
• Forge: forge-1.10.2-12.18.3.2511-universal
• SpongeForge? no
• Optifine? no
• Single Player and/or Server? - Both

A profile report would be useful in this case