"Deskari is a demon lord, commonly known as the lord of locusts for the swarm he brings with him wherever he goes. The reason he's headed for Mendev is to take out Terendelev, the dragon that protects Kenabres, but it's not exactly safe for him to stick around on the prime material for too long so he'll probably stick to a small handful of priority targets, which won't include you even if you attack him as long as you keep your distance. And no, you don't need to do anything for me besides stay alive, I've already gotten everything else I wanted out of this experiment."
Areelu Vorlesh doesn't, in fact, have that many extra magic items lying around. There are research projects she has, both largely half finished and not expectedly useful, and of course her own personal supply, but building up a surplus is hampered by the fact that she both already has pretty much all the ones she actually needs and her acquisition is largely limited to the things she crafts herself and that she can purchase in Alushinyrra. Getting to Absalom or Quantium from here is a major pain that involves multiple plane shifts and a teleport, and still leaves her with the issue that she doesn't, actually, have all that much in the way of normal money and no way to turn her spellcasting into that like most other archmages manage. Fortunately, her own personal supply is a broader term than might be expected, particularly given that it includes the backup items she leaves by her clone so as to have on hand after decanting if she dies. It's a bit risky to go without, but she hasn't actually ever died since her ascension and all that would really change is it taking longer after her death for her to be safe to be out and about again. She can pick up a cloak of resistance and ring of protection, both of reasonably high quality, and then a headband of intelligence and a belt of constitution and - no, not her robe of the archmagi, that only works for evil people, but yes to the amulet of natural armor. And she still has the gloves she crafted a century ago and couldn't bear to be rid of, that she didn't manage to finish in time for them to achieve their goal but would now have a second chance.
"I think this should cover most of your bases. Would you like me to grant you a permanent tongues and comprehend languages, or would you prefer not so you can better sell being a foreigner?"