Ok so just did the first Eris earth mission on my 3rd alt character and got 5 black wax when I completed the mission. I bet that's nit the only mission in the series that gives the wax either. Anyone who hasn't done this or has an alt that hasn't done this should run through the mission series and save up the black wax to turn energy into shards to speed up the process of leveling up their gear to level 32. Let's face it the hard part isn't getting the gear it's the grind of getting all the shards to level the gear.

hope this helps and if anyone else has any ways to farm black wax please share.