Re: ProjectZulu
Agree with @andrej88 - no harm in removing or disabling ProjectZulu. I don't run it on my server. Also, no problems at all removing/disabling JourneyMap.
Re: MineChem
Yes, if you're trying to use the 2.0.4 version, it seems removing or disabling MineChem is recommended. Nothing dependent upon it AFAIK.
Thank you very much!