So for this Spellbook, i'd exchange some Mana Crystals, a Wizard already has 10 channeling and does not need that many Crystals - it woud only slow him down and taking away a lot of actions.
If you want to work with the wizards tower, you do not need an elemental wand - you should add several attackspells, like fireball, force hammer, whatever to have acces to a toolbox of spells so you may adapt the enemy mages weakness!
You could add another Quicksand to gain more control and reduce the number of creatures to some fatties you realy want to play (i.e earth elemental, gorgon archer, hydra)
Please tell us about your strategie, Surpression Cloak is more likely to be played in a mana denial book....