I wouldn't even touch a raid roulette for 20 times that reward because I know and understand just how many of the people in those raids would be queued up not knowing even the first thing about the content. If you're talking about Coils along with 24 man raids, I'd wager that at least half of the instances that a given player landed in via roulette wouldn't even get cleared, so an Esoterics reward is completely moot. Had the misfortune to land in T9 or T13? RIP your tome bonus and hope you enjoy either a half hour penalty or 90 minutes of wiping to the same dumb mechanics over and over again. It might be worth it if Raid Roulette players could only be queued with other Raid Roulette players, but that would defeat the entire purpose of having a raid roulette in the first place.