I am afraid that saurus warriors and temple guards (M4) will not be quick enough to even reach the enemy, it will take them 2 turns, 1 running and 1 charging, before they can even face the enemy... I don't know what army your playing against but anything like: skavens(with cannon), tomb kings, any elves, any human races, or ogre kingdom with cannons would've already killed you before you reached them, not talking about any magic the opponent will use. if you are willing to take a slow army with your slann mage, then make sure you atleast have 1 skink priest with the cloak of feathers, so you can fly near the enemy to shoot your magic attacks.