I agree that kimahri would be extremely useful taking Yuna's path. That's what I'm going to try. Initially learning some of the basic abilities that rikku has would be very nice. Although a healing Kimahri does worry me a little bit on the offensive side when it comes to defeating those ronsos, and I'm not sure if I'll have Holy at that point or not... I'll still give it a try to see how it turns out.