With DD2, I did the following for each cycle:
BF after WU
Solids approx 1:00-1:15 after BF
A times were around 2:15-2:30ish. I followed her sleepy cues; she was pushing the A times out herself. Also, I noticed her sleepy cues were changing up a bit!
With the above general routine, I was still BF'ing her 4-5x per day.
With the longer A times, her naps were naturally extended to 1.5-2 hours. I would not let her nap longer than 2 hours. If her naps were 2 hours long, she was on a 4.5 hour EASY. And she was happy with that. I also started capping her catnaps too (they got shorter and shorter) until it was dropped completely.