Preditor is what you call yourself when you’re an editor who makes lots of editorial decisions and occasionally bangs out a script. If you’re a producer who edits occasionally, you still call yourself a producer, because there’s little value in letting your clients know you do the technical work, too (they anticipate technical screwups).
Some producers that edit have developed lucrative business billing for editor, machine, and producer time – and doing everything themselves on their own equipment – OR – they take an entire project’s budget and ‘get er done’ all by themselves. There’s a market for people who can do both jobs well, but it should only be done at double day rate, minimum.