I think I could shed some light here, been on Faction for the past 5 to 6 years:
Durability of the Candide series has come a long way from the 2014 Black Topsheet models. I believe if your skeptical still, I would point you towards the Prodigy.
Prodigy series holds strong, I have a pair dating back to 3 years ago that still skis park well and it is actually the Soma series though the Soma is equal to what is now the Prodigy 1.0. My Prodigy 4.0s have held up well. Overall these series does better than the Candide series.
Agent series, super excited about these skis, they are strong and ski very very well for the backcountry user, this ski will turn heads and quake the industry.
Dictators, strong skis, have held up well in the resort skiing over rocks and steep terrain.
Overall, Faction Candides would rank lower on the durable scale compared to other models but ultimately is something they know about and continuing to try to improve.