I use the amber-purple family quite often and if I want a little more yellows and blues out of it I will keep my flame as neutral as possible, and work it hot, keeping it hot so as not allow it to cool enough to flame strike, then I'll put it in the kiln to anneal. If it is too amber I'll just leave it in the kiln for another normal cycle, which never goes above 1050, but generally holds 1050 for 45 min to an hour.
Just bringing it back down to room temp and back up to 1050 seems to give the APs a slight strike without washing it out completely in purple as you would bringing it up to 1150 or 1200 for a normal kiln strike in my experience.
Those last few came out beautiful.
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