Replying to Armada Arv 175 (07)

alrighty then, I just bought a pair o' ARV's, in the 175 length. I have a few questions, and since searchbar isn't working for me, and my last thread was mainly about the 185 length, You'll have to bear with me. 
I want to get em mounted for primarily pow skiing(headed to silverton in february), seeing as I already have a few pairs of trashy park skis( But i'm not ruling out the park, I ride probably around 60-40% AM-Park). I'm around 5'9"-5'10", about 140-160 pounds, I think i'm a pretty good skier, I can ski everything at mammoth, plus some BC stuff there too. ( not too avvy aware though, I generally go with a buddy of mine)

1) What is the recomended line at compared to core center?
2) What is the best possible mounting point for powder?
3) What is the best mount for park? (probably core center)
4) What is the best inbetween/ all around point? ***

***(this is what i'm going for, although leaning more towards pow than away from it.)
thanks for the help.)