Are you sure Monkey wasn't reviving on his own?

But also Refresh Accessories give a 5% chance each, stacks to 15%, to prevent a skill from going on cooldown at all, and there are a couple of sets and masteries which have a chance to reduce cooldown

Thank you for your comment. I'm looking into getting my Rector Drath better gear than her current set, and seeing people are saying to look into that  and some Reflex gear set for PvE vs a Relentess set of gear. I haven't encountered either set yet in-game, so I didn't know about their bonuses. As far as Monkey is concerned, he could be. I never bothered to try to get him, he was phased out of a some kind of boosted summon event shortly after I came back iirc. So, I only know what it's like to be on the receiving side of his staff aoe attack tbh.

Monkey has a passive where he self-revives after 3 turns; 3 turns from *any champs*, not just his own, or even his own team.

Part of why I love my Fenax so much is that Fenax has a block revive on his a1: makes him an exceptionally good monkey-killer for arena :D