Dude I've seen more crashes due to wrong mixing selected lately. 9c or JR will do all that you want.... but its not necessary for Y/a F-18.

I've seen it fly with ailerons and with elevons for control and both are great. Flaps or not it land great.

Real airplane uses computer since 4th Gen combat aircraft are designed with negative stability; for increased turn rate etc. You don't need the drooped LE on your f-18. Besides real hornet after cat shot fly's itself in correct burner setting by computer for first 1. 5 secs or so. Do you desire your R/c version/radio to do the same? Just checking.

As to wash-out. Wash-out is good and agree with 30 flaps and 15 for ailerons for full flapped wing settings. That way wingtip has more wash-out than root, since defined as measured at "Chord line" compared to relative wind. Inboard flaps has higher lift but also higher drag to slow down acft (good thing) yet still some drag and good lift on tips at 15 degrees. This ensures the inboard section will stall first allowing wingtips to carry you and prevent death roll (tip stall), especially if ailerons are used to control roll on landing.
What you dont want is outboard ailerons only to droop causing wash-in, since chord line is now positive Angle of attack compared to rest of wing, and thus tip stall.

A crow set-up is actually extreme wash-out on the ailerons and used for diff purpose!

my 2 cents