For the next few days your looking at around 100 pax per day going IOM-LCY on 3 flights per day, LCY-IOM around 115.
if we saw Cityflyer metal on the route then it’s more suited you 2x daily E170.
We always see on these flights connections aswell to LGW/LHR, so they would have to time flights to suit both the connections and the A to B pax.