as for the split, I get 6 nights out of 14. I agreed to this right after BD (still in shock stage in she took advantage) but actually its ok in terms of Days (rather than bedtime and nursery runs) we both get 4 days in 14.
Biggest issue is that the divide means the longest she goes without the kids is about 56 hours, the longest i go is 128 hours
Both mid 30s, 2 young kids BD 7sep14 XW moved on long ago, now living with OM1 D paperwork in progress