I've been soloing Zakum daily for the Charm EXP, but am getting close enough to level 30 that I can spare a helmet or two now, if you're in need of a Zakum helmet feel free to contact me (PM/buddy me in-game/VM) and, providing we're both online at the same time, I'll get you a helmet.

You've got to be level 50+ with the quests done and enough potions (soloing takes me about 6 minutes, so you won't need many potions). I think the HP requirement is about 2.9k, but it might be worth researching since I'm not sure.