Last but not least, Rainbow Dash and Flightingale!  
So I paired them due to the fact that Flightingale is known to be very courageous, mindful of others and sympathetic to those with fears and/or worries, as she too wasn’t always fearless. She had a major fear of heights and high speeds as a filly, but her determination grew while her head kept looking to the skies. She saw clouds as an outlet to get over her fears, sculpting them into various slides and halfpipes with increased dedication to perform random tricks. Eventually other fillies saw her creations and soon wanted to try them as well. :)
 
Dunno what my next plan would be for these pairs…but guess we’ll see. ^^