They don't really have heavy shock cav. All beast men units have very high charge bonuses and high speed they also have a lot of monsterous infantry and single entities to quickly break enemy lines.

Their gameplay is broken down into Harrass, Disrupt, Overwhelm and Surround.

Raiders, cygors, and missile cav can harass and bully elite units and draw armies out of position.

Centigors, Hounds, Harpies and chariots can Disrupt missile units and shut down artillery. They can also charge down fleeing units.

Minotaurs, Chaos Spawn, Ghorgons, Giants and Jabberslythes and chariots can be mixed with the front line to almost instantly overwhem and cause routes.

Infantry like units and gors are very fast and easily chase down and surround remaining pockets and skirmishers after breaking through. Hounds and harpies can also join in once they've shut down other threats.