Believe it or not, most wizards can go for the same recipe that I'm going to suggest
Death: up to Feint. This is a mean trap at 70%, but use it wisely because it will simultaneously add a 30% trap on yourself. This will seriously boost your Judegement card!
Life: up to Satyr. If you don't want to go that far, since you can already heal through your primary school, then possible to up to Sprite. Remeber, Helping Hands can heal others but it cannot revive them, so at least get the Sprite.
Ice: up to Tower Shield. This shield will protect you again any attack and is the ONLY shield that shield you against the non-elemental attacks of Balance.
You don't want to forget the blades and traps from Niles the Balance tree in Krokotopia. They are free to you and they will boost your Elemental Blast and Hydra.
Don't forget to grab the Reshuffle card from the not-so-secret training person in Collossus Blvd. Put two of them in your deck and discard the first one you come across (this will allow you to continuously have the ability to reload your deck over and over again.