I have been helping a friend of mine (23YO, 400 Warlock) through every Raid since AoT began. He's someone who has watched all the videos and is living proof that doing so doesn't translate into knowing an encounter. I'd be seriously stunned if you could find a random player who is a less desirable fireteam member than him. I wasn't on for the first week, so we started with VoG and there was an internal bust up during first week of KF, so we stopped halfway through. His list of errors (some of these came well into encounters, not just at the beginning) - not knowing what the platforms look like at Daughters - not understanding the concept of counter-clockwise - not being able to count to 3 correctly - not seeing his screen turn green when he has the debuff at Golgoroth - not remembering his position for Golgoroth CM - taking one of the Brands at Totems well before anyone is ready, then not standing on said Totems - not knowing what an Oracle looks like - not knowing how Gorgons work - thinking that Bolt Caster is good at killing Gorgons, or anything, for that matter - not knowing how to use The Aegis but then being forced to because he can't kill an Oracle, having now identified them, without it - not killing Supplicants whatsoever - jumping excessively when Atheon is teleporting players - 2 Raids later, still not standing on the Totems - having to be reminded that there's a Gatekeeper that he's supposed to kill on the other side of the bridge - having learned that Bolt Caster is bad, using a barely upgraded Young Wolf's Howl to kill Hallowed Knights and Wizards - not knowing how to use the Sword against Crota, despite it being functionally the same as the other Swords he has used - throwing SIVA Charges at Vosik far too early - dying en route to picking up said SIVA Charges with high frequency - using Stormtrance to clear enemies at the Death Zamboni mere moments after someone else has already begun enemy control - not knowing where to throw SIVA Charges at Aksis Pt. 1 - not controlling the SIVA-controlled turrets - poorly communicating which Captain is on his side, which Servitor is there and whether or not it is near the plate - dying in an attempt to kill the Captain - being unable to see a plate with a large red light coming out of it that is a few metres away from him - standing on the plate, expecting the Supercharge to happen automatically - not realising that you have to jump on Aksis' back in order to stun him and blaming it on Glide - this happened 2 hours into the fight - thinking that low-impact Snipers and Fusion Rifles are good for boss damage - huge over-reliance on Self-res - almost never admitting when he's the one who made a mistake Lo and behold, he has every Challenge Emblem now and is on the final step of the quest for Touch of Malice, having only obtained (i.e. been carried to) Black Spindle about a month ago. If my friends and I, as a fairly mediocre team, can put up with him and complete all CMs, you should be able to do any PvE activity with just about anyone.