I don't follow your network description.
Sounds like
Tower (?? Radio) -> airmax <- Pico -> airmax AP/repeater (??) <- Pico -> ER
Is that right?
Or is it
Tower (Pico1) -> airmax <- Pico 2 -> wire <- ER
Sounds like
Tower (?? Radio) -> airmax <- Pico -> airmax AP/repeater (??) <- Pico -> ER
Is that right?
Or is it
Tower (Pico1) -> airmax <- Pico 2 -> wire <- ER