At the Lake, you can expect variable conditions. The front side is often hard pack groomer. The back side has a fair amount of wind sift and fresh snow - think 10 cm fairly often with more after a dump. I mostly ski the back side and typical winter conditions at LL includes lots of bumps, hard snow days, etc. The Canadian Rockies have wonderful dry powder, when we get it Most often, I use skis that are in the 90 to 100ish width range at LL. I have been perfectly happy at the lake on skis that are in the mid 80 width as well but I rarely use my Automatics (115 under foot) at LL. I don't know how you ski or what you enjoy; however, I suspect that, if you had both pairs at LL, you would ski the Armadas most often. Of course, if you only take the El Rays, there will be some of days that you wished you had the Dynastar.
I would agree with your alternative idea for something with a size like the Bridge for the Canadian Rockies. IMHO, a ski of this "mid fat" size would be a more enjoyable ski for most days at LL than the El Ray, and you would also be happy using it at places like Kicking Horse where it more likely dump.