Celestial Essence
Celestial Essence is actually quite easy to make since it requires regular vendor trash from just about everywhere. All the weird items that you see people looting in groups that say they're used in Tradeskills but you never actually knew what recipe they are used in... Most likely are used in this one. First things first when you're ready to make some Celestial Essence you will need to buy the easy, vendor purchased piece first which is Celestial Solvent.
Celestial Solvent can be purchased in a few different places but the only place available to use in Classic EQ is East Freeport. Your two choices of vendors here are Eyasie Dyrius and Quareran Borius, both of them within spitting distance of each other. Once you have some of that bust out your fancy Mixing Bowl (Yes, the same Mixing Bowl that is used in Baking) and combine the Celestial Solvent with any of the following items:
The combines are all No-fail, which as the two words imply you cannot fail these. Also there aren't just single combines that you can do in order to make some Celestial Essence. Each of the items (if you have 3 of that specific item) can be combined using Concentrated Celestial Solvent and three of one specific combination item. The Concentrated Celestial Solvent is sold by the same vendors that sell the Celestial Solvent, how easy is that?! As a side note, if you're confused as to what I mean with the whole combining three thing, here is a quick example...
Say you wan't to save some time clicking so you collect 3 of one of the items required instead of just one and instead of a Celestial Solvent you use Concentrated Celestial Solvent. Combine the Concentrated Celestial Solvent with the three items and bam you got 3 Celestial Essence. If you need a visual to help you understand check out my pictures below!
Result: