ive had the invaders for the past 2 years and wish i could get next years, but since im a giant 6'5 the 178cm is to small.....if i was you i would go with the invaders or anthems in a longer size than you have.
i would say line anthems the length would be perfect for you (178cm)....plus next years graphics are sick.
since your skiing 75% park are you more interested in getting symmetrical skis and center mounting them?
the moment stilettos look pretty sick.
womens symmetrical park ski 171cm (114-88-114)......im pretty sure its the same as the reno jibs just diffrent graphics.
they will prob be hard to find em cheap tho.
shorter skis will make it easier to spin on to rails and boxes. you can throw them around more.
you dont want to go to small tho. compared to how tall u are.