Plated Chasers are encountered in the Golden Lair and the Underground Lake. They can slide across ice to chase you, though on land they need to pause for moments of rest and can easily be avoided in this fashion. Of course, besides that, the best way to be rid of them quickly is with the Bushi class's Roar ability. It may also help if you can bind its legs, this will stop it from using Oil Spin and Grinder.