Spears can abuse Spear Crusher, which hits up to three monsters three times each, while Pole Arms will excel with Pole Arm Fury, which hits up to six monsters once (and might be a bit faster). Spear Fury and Pole Arm Crusher exist too btw, but for obvious reasons they're not as good. Fury only wins over Crusher if there's a lot of mobs, and typically in most training maps you'll find mobs in groups of 2-4. Also, since Pole Arm Fury gets the most damage by hitting the most monsters, Fury makes a very poor skill to use against solitary targets such as bosses.
One good thing there is to say about PADKs is that they can get sniping spots occasionally, such as Crimson Guardians.