Does your high interest rate card have an annual fee? I was approved for one after CH7 and it has helped with my AoA through the years. It does have an annual fee that I gladly paid the first few years after BK. Now I call right after the AF is added to my statement and they always remove it. Wish they would do it once and for all but they won't budge. It has a 29% apr variable which has never gone up and I never carry a balance.
Just some food for thought.