To the best of my understanding, "Focus Mass Runed Spellcaster's Essence" can only be obtained via research. It didn't come up on my Heroic Enchanter's spell list and I can't find anywhere where one would purchase it. The recipe is on EQTraders. So, I collected the ingredients from one of my mules, jumped back to my Berserker (who maxed out all tradeskills), made the spells (a spare for a friend, too), and it's No Trade. This would mean that any caster that wants this spell needs to research it him/herself. Is that intended? If it is, please reconsider as the combine has a trivial of 494. Or make it sold at the appropriate PoK vendor.