What a surprise! You reccomend the same ski you have! Listen, he lives in Ontario, all park, he needs a park ski. Ar6's are great, but are more geared towards all mountain.
I think the invaders would be your best bet. You could go fujis, but like Quearnyislad said, the symetric shape will help out in the park alot.
So, my message? People seriously need to stop being so bias about skis. I notice, when people are recommeding skis, I'll chack thier profile, and guess what? Somehow, they always manage to reccomend the ski they ride. In my opinion, thats pretty childish. He's a small guy, and probably doesnt want a stiffer ski like the ar6, PE, chronic, or FS WRS. The invader is soft, buttery, light, and AFFORDABLE.
With my most sincere regards,
"Skiing should be more like other "action" sports in which there are many different styles and ways of going about it all in which are accepted..make sense?" -powfoka