Hi, I have just (yesterday) dropped the fourth bf with my 8mo dd2. I did as you described, so that the three remaining bf's are at 7am (wake-up time), 12.15 ish (after lunch) and 6.45 ish (before bed). I used to do a 7, 11, 3, 6.45 schedule. If you find that your dd doesn't want much milk after her lunch, then maybe keep the 2.30pm feed instead, and just drop the 10.30am bf.
I offer dd2 a snack now (with water in a cup) when she wakes from her naps, but am still working on timings and amounts.
I did the same with my dd1 when she was around 10mo, and exlusively bf her (at 1yr started intro cow's milk, but did not wean her completely til 25mo).
Good luck!