hey there, you can try hunting it instead? Spectre boss drops it as a common. He's based at giest village but you'll need to take a quest from the pub lady in kleya.
My recommendation for the top-fastkill-solo class will still ultimately be Alchemists due to Damage disable sets and defense-ignoring Ailment damages. It's nigh-impossible for any other class to easily catch up, even with the introduction of Lv360 skills in the far-off future.