I understand what you are saying about working in the "type". And I did consider it since it would be the quickest and easiest route to go. The birds of the type are lacking in patterns though. With Polish being splash, black/white, blue/white. buff, silver and gold laced. Then mottled from houdans. I'd like to see double laced like barnvelder or penciled or even multi colored like the tolbunt polish (which I would get but it's pricey). The mille is an accidental possible cross, if I was determined to get that color I would have started with a pyncheron, and I would love to get a small flock of those! But space limits..
I know at 3rd generation I'm far beyond "type" to consider a cross of my color "sultans" but the reason I would probably do it at that point is to deal with the recessive white gene. I think by 2nd generation of crosses I'd already be getting 50%+ of white non sultan type white chickens and only 1/4 or less of colors on the 3rd generation. So I think crossing a colored "sultan" roo would be best to do earlier and actually try to remove some of the white recessive. It would stagment me for type on that generation, but would give me more colors with less recessive white on the next generation. The whites will get better and better though and eventually should dilute the inbreed, limited sultan bloodlines. But I think waiting later to do color crosses will give me too much white and less colors to work with.
I know I'll have to cull pretty heavy(cull being they go to auction). But I also need to keep the bloodlines dilute or I'll end up with colored sultans who are as inbreed and limited as white sultans are. There are ways to go about this that are quicker, culling heavily, starting with polish, but I feel that by putting in barnyard mixes or pure breeds who are no where near sultan form I might actually be doing the breed some good in the future as long as I keep adding additional bloodlines with my roosters and not keep using the same sultan rooster over and over again.
HA this gives me a reason to get more sultans..