You can do this, but I would recommend adding more war wizards and/or drow wizards.
As you suggest I was intending to use multiple (2nd level) Drow wizards. Using 4 of the 4th level war wizards might clutter the creature deck with an unplayable number of high level figures.
A general note: Named powers don't stack.
For example, if an Order card gave a creature FLANKING (see below), and you attached 2 of those Order cards to the creature, he would still only have +10 to his attacks from FLANKING. (He could still gain bonuses from other cards, but the power FLANKING would only give him the +10 bonus once.
FLANKING(This creature's melee attacks deal +10 damage while at least 1 ally is adjacent to the target)
However, if a creature had 2 Arcane Ritual cards attached to it, you would draw 2 Order cards at the end of its activation.
Arcane Circle Attach text: At the end of its activation, if this creature is in a Magic Circle square, draw 1 Order card.
Thanks for including that clarification. I'd never have guessed "Block" didn't stack from the rulebook & the cards wording.