Spit needs to be nerfed, Hammer Slam needs to be buffed
There is no doubt that after playing both characters (I only play assassins), I can safetly say that using UB with the spit is too damn easy while playing a Melee Rook with the Hammer Slam is pointless.
First and foremost, spit always hits, Hammer barely does even with the boulder roll. This automatically gives spit a huge advantage since it's a guranateed full damage while missing with the hammer slam results in something you might as well auto attack. The only advantage the rook has with the Hammer slam is slightly cheaper mana cost.
What makes the spit even more scary is it actually deals more damage then the TB fireball and has the same cool down, although obviously less range (but let's be honest, late game UB has no problem chewing someone's face off at melee range).
Considering one of UB's weakenesses is supposed to be "range", it makes no sense to make his only ranged attack to be one of the strongest in the game. It also doesn't make a bit of sense to put the hammer slam to have such horrible damage based on the long cast time and low "accuracy". Unless Stardock wants all Rook sot use towers to become useful, this should be changed.