@Joe
I have played more against the FM than playing her (avoid d12 rolls). Your Mage Wand with Dispel suggestion is a perfectly good defence against the FM, especially if you have Nullify and Armour Ward protection. Ideally a Nullify that you can Transfuse from a (non-threatening Slow resilient) guard in range when a Dissolve is cast at it (at range 1 which that type of build avoids). Obviously this suits ranged control mages like Wizards best.
FM is very dependent on her enchantments to boost/protect her and hobble enemies. Her equipment is trickier to Dissolve (range 1, can be Nullified). Mage Wand with Dispel is perfect if you can protect it (it's bad news if she steals it to her off-hand, bypassing Armour Ward, but that's a pretty rare play).
The problem with FM's enchantment over-reliance is a Wizard can always Purge Magic (after testing for a Nullify) and laugh at total cost of her lost Forcefield, Bear Strength, Vampirism, Cheetah Speed and Mongoose Agility (latter for bypassing the Charmed non-flying guards being zapped by Spores). The only defence against mass enchantment removal are the Wardstones which work best with a mana denial strategy (which a FM can play). At least with a BM, you can spread enchantment buffs evenly when facing a Wizard. This is another reason why I avoid the FM. She looks so cool though....
I totally agree with you that Dispel Wand (from CoK) is just not good enough. What's wrong with it?
[1] it destroys enchantments at range 1 not 2
[2] most must-Dispel enchantments are level 2+ (Force Hold, Ghoul Rot, Enfeeble, Death Link, Vampirism etc)
[3] Wizards don't get a metamagic discount (from Arcane Ring) unlike with a Mage Wand with Dispel
Shad0w mentioned that, for CoK, he voted for Wand of Healing but got outvoted and Dispel Wand was inserted (no doubt with Wardstone, they felt the meta needed anti-enchantment tech). Sadly Dispel Wand is too limited. I'm very happy that Wand of Healing is in the new set. Needs to be added with the undead poison conditions, Lotus etc. BM finally has repeatable condition removal (this is what Staff of Beasts should have done, most BMs play Mage Staff). It's good news there will finally be this wider choice of wands. Genuine choice is good!