I would say for either choice go up a size to the 180s range, I had the 184 or 186 version of the old version of the devastators and really liked them. They were one of those skis that got its stability more from weight rather than stiffness, but I know when 4frnt switched up the devastator design they are alot lighter. I never wished that they were shorter though and I am similar height and weight. If your goal is to have a chop slow-stroke demon ski length is pretty key, went up to 189 wrenegades after I fucked the devastators up and like them even more.
I think some of the like "standard" big mountain skis would be good options too, Mindbenders, Kores, Rangers etc. Ranger 108s and Kore 111s felt like you could go fast as fuck on them however a less lively ski because they are so stiff. Alot more directional and less jibby but would be best for stability in the chop if thats your main goal.