I chose the path of the warlock at the mage tower in South Qeynos. I could not find any information about the quest in the forums, so I just went in and did it. It involved getting some ritual stones from a gnoll chanter, diviner and oracle in Blackburrow, and then to follow up with an instanced fight against 4 elementals, the last to be a large earth elemental. I succeeded in the quest, became a warlock, and was very happy. Later I read about the Path of the Illusionist quest on a forum, and it was the same quest!!!! They described everything that I did in exact detail. Should warlocks and illusionists do the same quest to follow two different paths? Oddly enough, one would think that it would be summoners who would fight elementals for their path quest, not enchanters or sorcerers. Who knows, maybe their quest is the same also??