Re: Maybe I just can't solo
(1.) Your resists are FAR too low for Hell... I'm surprised you made it as far as you did, so take that as a compliment to your playing abilities! Personally I will never voluntarily play any character in Hell with resists less than '50' across the board (maybe 40 or so for Poison... but don't get tagged by Radament or a zombie in the Ancient Tunnels), but then again I only do Hardcore so if you're willing to sneak back and reclaim a corpse in SC once in a while, I suppose you could get away with less. However with negative or zero resists you are going to die a LOT, especially to boss and Champion type monsters with ranged elemental attacks (Gloams come to mind here...)
(2.) I'd suggest an Act 2 Normal (Prayer) Merc with an Insight (Ral-Tir-Tal-Sol) Runeword in any decent 4 socket polearm (a Bill or Halberd will do, but preferably something more damaging, say an ethereal Partisan or Bec-De-Corbin). The Merc's Prayer aura will synergize with the Meditation aura of the Insight, meaning that Waheed will be able to take a lot more punishment before he goes down.
For your Merc's armor, Duress is a good Runeword (but the Um rune can be expensive), so in a pinch, see if you can get him something like Boneflesh (up this one to a Templar Coat in the cube) or Toothrow for Open Wounds (an upped Rattlecage is useful for the Crushing Blow, too, but some players don't like the Monster Flee chance that it also has). You may want to craft a Blood hat for Waheed in the cube, so he has at least a little life leech and Deadly Strike, although remember this doesn't work against Undead, of which there are plenty in Act 2. (Stealskull is also good, so the hat isn't as important as the Insight.)
As an Orb / Meteor Sorceress, your best tactic in most cases is hit and run; teleport within range of what you're after, quickly fire an Orb or two to slow them down, then either let the Merc handle them or drop a Meteor on them. The second that it looks like the bad guys have you locked in their sights, Teleport away. You don't have a lot of hit points, so you will have to use better mobility to offset that limitation.
Good luck!
Cheers
Mr. Bil