Is the kid an infant ticket or paid seat?

If two of you with infant, DG combo. Done it many times. We generally chose 18 DG since in back and nobody my kid can harass behind us. Also close to lav at door R2. But to be honest any will work. *EXCEPT* 11DG which are the "give me a refund" seats if you get stuck there. As I say upthread, avoid 11DG at all costs. It has to do with the lav entrances which open in to your seat, and to lesser degree galley curtain.

If you have 3 paid seats, any DG + A or K combo. Same row. Also done this many times with our helper. Works like a charm (esp if you're the lucky guy in the A or K seat!)

Same rules apply for my other post and the article Percy posted. Service flow is front to back (I don't really care). Galleys can have a little noise. If you care for trivia on 35K I believe the rear galley is used by EY / W whereas for 35G rear galley is extra for J. (But main J galley is front by doors 1).