blags quest for the perfect fitment, you could write a thread about it..lol..
I dunno but im more of a tuck than a poke man so my opinion may be different to yours and others
I think rim should be close as possible to flush with guard, tyre size is determined by what will then fit under the guard without too much stretch. And stretch front and rear should be even..having a rear stretched more than the front looks unbalanced..and rather silly IMO..camber should also be close as possible to even front and rear..
in your case from a stance only view, I think the 17 fornt 18 rear worked really well and what it needed was a better bodykit to make it all work without the need for excessive lowering..
i havent been to stance nation for a while so maybe im outta touch