Hello. I think you are aware of this, but some mods don't play nice together with Farseek.
I think you fixed some issues with other mods, but mine (https://minecraft.curseforge.com/projects/water-strainer) keeps crashing while Farseek is on the server with a NoSuchMethodError.

Some crash logs:

• https://gist.github.com/kreezxil/ac4bb2ca7d0c76412bad7a21ff1c4fe2
• http://pastebin.com/sM6Tm2cf

This should be fixed in Farseek 2.0. Please give it a try and let me know of any issues, thanks!