Mine is a paleface compared to yours! ... I am quite happy with it, but it's just so not me as I'm not the fluffly, frou-frou, frilly type. Yours is my colours to a T!!!!!!!!!! The vibrant greens, yellows, oranges, purples. oooohh!
The best way to figure out placement .... get them all up there and don't worry too much about the where at first. Then start doing the shifting. I tried to not have straight rows of similarity of design and colour... somewhat have them show movement in the placement, by coming up in a swirl, rather than that straight line. I think you have a really good start with what you have already.