Use skulls when you cant track with the beam and the beam for any close and personal encounters. Sorry, but it's the truth. Stick to Bite unless you are trying to get somewhere that someone is in the way. The claw is the same as the wind wizard staff. When firing at something close, use thornblast.
Tornados are great and home in on wizards and defenses.
Wally comparitively sucks since he gets lost and confused and eventually will walk around aimlessly. Learn to kill plants with him. Your Magic missile is stronger than normal and usually better than whirlwinds because of how many you can fire per second. If someone lands on a whirlwind, they get stuck and whirlwinds do a lot more damage. Clone if you are on the ground for any amount of time and visible to an enemy, but usually fly.