Replying to 3 ski quiver for Whistler?

OK so next season I'll be skiing Whistler all season, I am 5'11" and 150lbs and I am unsure whether I need a 2 ski quiver or a 3?

I have some 176 Dumonts for mincing around in the park on but I'll clearly want a pow ski and am pretty set on a 179 hellbent, now I have read all the reviews but I still think I'll want another ski for more crud and 6" of POW.

So I was thinking about the 179 Obsethed, I have skied maidens and seths and loved both so I figured this would be a good crudbuster but I am not sure how it will ski with its increased rocker. Another option is next years blend but if I mount it a bit forward I wonder if the tips will dive.

Is there too much crossover between the Hellbent and the Obsethed or is the Blend a better choice. I'll want my second ski for a bit of everything really,probably slightly steeper, more technical terrain and steeper than that with the Hellbent, though I want it to have plenty of sidecut. any thoughts??