If the first A being shorter (whether treated as the first A or treated as NF) works then do that - yes it looks like 50-60mins and a 2hr nap.
Then a longer A more like 1hr 15 because I think you had some 1hr 15 and 1hr 30. It may be that 1hr 30 would be too much if you cap the nap at 2hr, see what you think from their cues if possible.
The only thing is that, just now, if they keep doing 2 hr naps through the day you run into 3hrlys E and some difficulty with when BT comes, eg:
NF or WU/E 7.30
50 min (either dim light and straight back to bed or light on if counting as first A)
S 8.20 - 10.20 (2hr)
E 10.30 (only 3hr E but this helps to keep the rest of the day on track)
A 1hr 15
S 11.35 - 1.35 (2hr)
E 2.30 (careful not to feed to sleep)
A 1hr 15
S 2.50 - 4.50 (2hr)
E 5.30 (again 3hr E)
A 1hr 15
S 6.05 (
) CN or EBT
You might need to wing it a bit and judge based on nap lengths and where you get up to in the day whilst a routine settles into place.
Considering they like to sleep I'd see no harm in a 6 or 6.30 BT so long as they get enough E times, yk?