The more still you can bump the level up to 15, the quicker it will go. At this point however it appears you're coming to an end and most of the chlorine added during the day will be consumed to the sun. It's a personal call at this point (speed vs cost) however if it were me I'd start only dosing at night and early morning.Is sending the FC to 15 in the morning and then in again in the evening sufficient at this point of the process? Or should I try to do it 3 times a day as I did during the first part of the conversion?
Is there a "best" time to test CC? Once my CC's are 0.5 or less for 2 days in a row, I can stop maintaining FC at 15 as the conversion is considered complete, correct? I can then get the chlorine to the recommended levels. Is there a preferred order to bring the pool to recommended levels? FC, pH, then TA? And then after a week, I can test to see if my CYA is in an acceptable range.
There really is no "best" time for testing the Combined Chlorine. Just keep testing overnight until your lose is 1ppm. Again, you're very close. As for the other levels, after the FC lowers below 10 you can run a full set of tests to see if anything needs adjusting.
Is there anything I should be watching out for, or anything that I may be missing in these next few steps of this conversion?
You've got the process down, and will quickly find how easy pool care is! I can tell by your posts you understand your water now. Just get ready to enjoy your pool. Keep brushing as often of you can, including every little nook you see. The stairs, skimmer, lights, returns.........all perfect hiding spots for the Baqua-goo. I used a toothbrush even during our conversion to really scrub all I could. Every bit of manual labor really does help the chlorine do it's job.