Well, in the case of the jungle wyrm it is by far the weakest of all the farmed world bosses I've encountered. It is often dead within 2 seconds of not even having fully spawned yet. Not even the Svanir shaman goes down that fast. Conversely, the Golem boss in Mount Maelstrom is a long fight compared to most of the other bosses and without having any periods of time where you can't attack, like SB for example. I have actually logged off at the beginning of the golem fight, logged into an alt to do another world boss, and logged back to the golem not even at 50% yet. I don't know what makes it so different, but jungle wyrm could definitely use an infusion of its sturdiness.