My level 70 rogue molo'd him today and he was red con. Now I don't know that he would be level 50 to someone else, but being red to me at 70 means that he was at least 74.
Edit: He is a target of a poison task from Poison Master Elmn in Rivervale. http://eqbeastiary.allakhazam.com/search.shtml?id=33857 "A Small Favor - Texx Pic" "Hail, Poison Master Elmn' Poison Master Elmn looks you over, assessing your worth. 'Hello there <name>. It is good that you have come to me today, that you have sought me out. I ws just saying to myself, Self, I said, who is worthy of this [opportunity] I have? And now, here you are!' You say , 'opportunity' Poison Master Elmn nods. Yes, a most fantastic opportunity. I happen to have in my possession certain items. These items, when combined together, form [toxins] of various purposes. You might put one on a blade and if your hand happened to slip and the blade pierced the side of your enemy, why that enemy might begin to suffer terrible agony. And that would be a terrible shame, wouldn't it?' You say, 'toxins' Poison Master Elmn laughs. 'You're interested? Of course you are! But I am a businessman. If I were to give you these items you would need to do a [service] for me. You say, 'service' Poison Master Elm smiles grimly, and you suddenly realize what a dangerous individual you are dealing with. 'Here is your task, young one. Do not disappoint me. Never forget the tools of your craft - you must be invisible to detection or you will surely die. And you're no good to me dead!' You have been assigned the task 'A Small Favor - Texx Pic'. Enter the West Gate of Freeport near the Common Lands. Sneak along the path precisely to avoid detection! Sneak along the path precisely to avoid detection! Sneak along the path precisely to avoid detection! Sneak along the path precisely to avoid detection! Sneak along the path precisely to avoid detection! Sneak along the path precisely to avoid detection! Sneak along the path precisely to avoid detection! Plant the bomb and hide! Run to the Hogcaller Inn while the guards are distracted and 'deal' with Texx Pic!
Reward for the task: 20x Consigned Bite of the Shissar XII 20x Consigned Embossed Sealed Poison Vial 20x Refined Grade AA Mamba Venom 20x Suspension Fluid 20x Emulsifier
Also, my Gamparse file shows that I did only 24,468 dmg, so he only has about 25K hp at level 74+ (probably level 75, since this is a rogue poison task, and the poisons are every 5 levels).