Rizzu can't increase his SR beyond 110. The issue is in the final 5 overs, the guy will max get you 40 of 30.
If he was opening then I'd be okay with it cause a 90 ball 100 is welcome.
But he's playing at 4, 4 is a crucial spot because unless it's a collapse, you need to expand upon what the top order has built, which is keep up with the run rate and build upon it.
A 110 sr that rizzu gets stuck at in odi, is costly at no 4. That's why I advocated a best position for him to be opening over imam. His style of play is welcome their but its suicide at no 4.