Here's what I would choose. = )
SCIV Edition
Males
-Raphael's 2P: I always found myself using the duelist pants and boots the most and it would have been awesome if they kept the set.
-Maxi's 1P: I'm sure everyone here knows how much I loved Maxi's 1P outfit in the this game so I'll just leave it at, I so wish they kept this. xD
-Yoshimitsu's 2P: The Asura set rocked. I found myself always using the Asura boots & gauntlets the most but the whole outfit was great and very useful. :)
-Zasalamel's 2P: The Death set was quite cool. I always found myself using the pants thee most.
-Yun Seong (Both): I thought both were pretty cool though I didn't own Broken Destiny myself so I didn't get to use his 1P at all but if I had the chance, I know I would be using it. His noble set was quite cool though they did keep the Noble Garment in the game, only less detailed and excluding the fur cut off sleeves.)
-Rock 2P: Mostly for the Hero's belt. If they kept that in the game, I so could have used it on my Native American character. lol
Females
-Amy: The Night Butterfly set was quite nice. I liked the dress a lot.
-Ivy's 2P: The Belle outfit may not have looked good on Ivy in my opinion but for CAS, it was awesome. I mostly found myself using the Belle boots, gloves, & skirt quite a lot.
-Seong Mina's 2P: I really liked the coat. Didn't care much about the spaulder & underwear but the coat and boots rocked. :)
-Xianghua (Both): The outfits looked nice and worked nicely for Chinese characters. Like Maxi, I didn't own Broken Destiny but I could see myself using her 1P look. ^_^)
-Taki (Both): I liked the Kunoichi robes and if I did have the option, I would also use her 1P bodysuit. I liked the added fishnet design to the outfit.
-Hilde (Both): Hilde has some of the best armor in my opinion for female characters. And the princess outfit was very nice too.