Warlock vs blasting Wizard: summon at least one creature before he starts stunning you, but preferably 2. Necropian Vampiress is a good choice. She has a bit of armor, and with vampiric she'll be hard to kill. At that point your opponent can stun you every turn and still get ripped apart by your creatures. If you expect to get hit with a Lightning Bolt every turn, prepare quick spells. Build up 3-4 armor. Toss a Ghoul Rot and/or Magebane on him so that he's taking damage as he attacks you. If he's spending all of his actions on attack spells, you should be able to deal with him with a few creatures, some armor, and a few curses. You'll damage him faster than he'll damage you, even with Voltaric Shield. Then there's the option of just Dissolving the Wand, but make sure that you don't lose your Dissolve to a Nullify.
Forted up Priestess: hit her before she gets forted up, destroy the cards that give her an advantage in that area, play more threats, buff your threats so that their attacks are powerful enough to get damage through anyway, use direct damage, and/or use position control to force her out of that zone.
