There are virtually three films inside style maestro Sam Raimi’s hilariously bonkers “Ship Assist,” a deviously darkish thriller-cum-horror comedy. There’s its first act—workplace politics and office f*ckery, hinting at power-play dynamics and control-freak dominion. Then comes its second chapter, the place it’s immediately “Survivor,” with two rival colleagues stranded on a abandoned island. Lastly, a 3rd and ultimate phase that’s wickedly scrumptious: the chapter during which Raimi lets himself emerge into the full-on cinematic, ear-to-ear-smiling demon that’s Sam Raimi.