I am wondering how big your Sae's are just now.
As they grow they become hogs and will eat any flake food you put in the tank and forget about eating hair algae. They may outcompete your corys. I had this happen with just one Sae and 6 cories. The cories starved before i figured out what was happening.
Sae's can grow up to 6 inches long and eventually will start being territorial.
Also those little ottos will have to compete pretty hard with the sae's.
The flying foxes are also known to become territorial as they mature.