Repeating things I've said earlier in this thread but, as someone who watches almost every Rennes game, Doku is still way, way too inconsistent and wasteful to be anywhere near our level, IMO. I don't even really rate Palmer all that much but I'd sooner have Cole starting for us than Doku at the minute.
He's capable of great displays like last night, but not all that often. And to be honest, the opposition was pretty awful. Very regular injury issues too.
There's certainly potential there, and I hope he can reach it, but there's still a long road ahead for him. And out of all of Rennes' star wingers of the last few years - Dembele, Raphinha, Terrier, and Sarr - I'd rank Doku dead last at the minute. And the only one I'd want near a City squad would be Terrier.