Reapersaurus: I don't think I did make him such a weak foe. Sure I lowered his physical stats, but I raised his intelligence to make him a better wizard than he could have been sorceror with his base stats. I think the versatility inherent in the wizard class makes it less useful in combat, but more useful for an intelligent foe.
As for magic items, he had Boots of Striding and Springing and Speed (which he used). He had a couple of wands that he never got around to using (because his spells were more effective). He had a Deck of Illusions that was to provide a diversion while he escaped but didn't get a chance to use. He had some other items as well that I can't remember off-hand.
As for having no streategy, I think he did have a strategy. Stay in the shadows watching. Then when that failed, he switched to the secondary strategy of: do as much daamge to the party as possible while staying alive. He started that with his enervation, and had he gotten two more off, someone would have been dead or nearly dead. He also tried to hide and still attack, which is a very good stategy: it just failed.
Also, when he was first created, he was more than a match for the party. However, they gained quite a few levels in between meeting him and fighting him. But, since I'm not a DM who likes to fudge things for my players, he didn't gain as much experience as they did, since he didn't have as much time available for adventuring.