@HDPlayer
well, Perditio isn’t chaos so much as destruction or ruin. Still not sure how that applies to Applejack, though.

A few things just don’t fit. Maybe adding secondary aspects and moving some things around can flesh it out. After all magic isn’t primary either.
 
Rainbow Dash: Aer, Aqua, Lux, Volatus (Air, water and light make a rainbow. + flight)
 
Pinkie Pie: Ignis, Victus, Alienis, Motus (fire, life, strangeness and motion)
 
Starlight: Perditio, Permutatio, Auram, Vitium (chaos, exchange/change, aura, corruption/magic abuse)
 
Twilight: Praecantatio, Cognitio, Spiritus, Ordo (magic, mind, soul, order)
 
Fluttershy: Terra, Arbor, Bestia, Sano (earth, tree, animal, healing)
 
Rarity: Ordo, Pannus, Vitreus, Sensus (order, cloth, crystals, senses/seeing)
 
Applejack: Terra, Ignis, Arbor, Meto (earth, fire, tree, harnvest)

@HDPlayer  
No idea, but I agree with your assessment

why the fuck is Applejack Perditio? if anything pinkie should be chaos. and Applejack Terra.
 
also changed tags acordingly.