He folds 22 if you shove the river surely every time? Maybe you get him to fold 88 as well although unlikely. How can he call the river given the stack sizes if you shove the river with 22 given how tight you think he considers you? I think i am always shoving the river for the extra £400 into such a big pot just to have the bluff edge running for me when he folds 22 and/or 88. You should always have aq in his mind. Waiting for the 'stick to darts arb'!
Well it's like 450 into 2300. He only has to be right a fifth of the time to profitably call. We're also using the power of hindsight to assume that he doesn't wake up with AQ himself in this spot or A8s aside from 22 or 88. The river jam is a sexy play if we have significantly more behind where he's getting worse pot odds to call with 22/88 but for 450 for 2.3k I just don't think we get it through enough.