Complex sentence: Shamblers cost the zombie master a small amount of resource points, and the shamblers are fairly frangible, but with a strong melee attack, these zombies are used in large hordes to clog objective points and corridors.
Split into simpler sentences: Shamblers cost the zombie master a small amount of resource points, and the shamblers are fairly frangible, but with a strong melee attack. These zombies are used in large hordes to clog objective points and corridors.