But not now ;-) Just realized that if you folks are saying "world boss", he's way too tough for me. (Ward 30/S 30)
Yes, you will definitely need to party up, preferably with some higher level players, to take out Joblid. If you're in a guild, ask them to help. If you happen to find Joblid up and floating around, put out a shout in /Zone, you might be able to find some people willing to assist you.
Funny thing is that for two of my active toons, I bypassed Joblid and simply bought the quest reward (Bloodthirst Earring, Heroic or Magic) off the AH and never completed the quest. I was lucky with my midget. A friendly and helpful person (Nerdo on Osha--thanks bud!) partied me up and roflstomped the noxious weed, allowing me to complete the quest.