Replying to Afterbang vs. Revival vs. Stepup

so I am looking at some new skis for the coming season, I am 165lbs and 5'9 and looking at a few skis from last year that are on sale now for cheap. Ive kinda narrowed it down (mostly via price) to:

Line Afterbang 184cm
K2 Revival  179cm
Line Step up 176cm

I like a stiffer ski and will be using this ski strictly for park (ie. the edges will be gettin de-tuned as soon as they get in my hands). I have ridden Salmon dumonts and suspects over the last two seasons and liked the flex, weight and performance but both pairs only lasted one season before they were trash

Im mostly interested in what the stiffness is like in these three skis as well as durability

any feedback from anyone who has ridden any of the three skis named above would be much appreciated
+Karma