Devil’s Workshop is, mostly, a two-hander.  An unhappy actor, Clayton (Timothy Granaderos of Netflix’s 13 Reasons Why), is trying to gain insight for a role he’s aspiring for.  For knowledge, he shadows experienced demonologist Eliza (Radha Mitchell of the Silent Hill film franchise) for the weekend before the pivotal callback audition.  Turning the tables on Clayton to probe more about his life, Eliza is eager to perform a ritual on her guest to alleviate woes,…