Have they ever fought in canon? I know Sidious didn’t trust Dooku enough to handle Maul w/o him turning and teaming up w/Mual which brings into Q why he DID Trust Vader. I know Ventress ended up in a similar sit as Mual after Order 66, which makes me wonder: 1: pre-O-66, did she ever take Maul on & 2: Post-O-66, did she take him on or join up w/him at all?

1