Replying to Kartel 108 vs Kartel 98 vs Magnus

Hey! I have managed to sell my old pair of skis and am looking to buy a new pair. After doing some research, I've narrowed it down to the following 3: ON3P's kartel 108, kartel 98, or Magnus. Here's a little about me

I'm about 5'8 and 140lbs. I used to ski on a set of 2013/2014 Line Blends but found that their edge hold wasn't too good at times, especially on ice. I would describe myself as an intermediate-advanced type skiier, comfortable on all runs. I ski 80% piste and 20% park, but even then I'm just starting to get into park so it's mostly groomed runs on piste. That being said, I like going fast and I like to jump around the mountain and go off-piste if the conditions permit. I try to ski switch from time to time. I ski a lot in the Alps, but will be heading to Whistler in the spring on exchange and possibly Japan too. I know I'm asking for quite a lot but I'm basically looking for a one-ski quiver that's better than the Blends; something that's sturdy and can hold an edge but is also fun.

Any advice? And also any advice on where to mount the skis? I'm leaning towards the Magnus and just mounting them -1 from center for piste performance (as advised by the great wizard Magnus himself) but I am worried a bit about its performance in powder/ slushy snow. That being said I've heard nothing but good things about the Magnus and I don't even get to ski powder that often. Maybe it'll be an excuse to get a pair of powder skis ^^

Thanks for the input!