Best economy seats - 747 conf 4

HI All

I am flying Miami to LHR in August in economy overnight with the family (will be a step down from UC on the way out but afraid no reward seat availability on the way back apart from economy)

What in your view would be the better seats to book, either row 61 to 64 (which is a 2-4-2 configuration which has better leg room in seats A, C, H or K) or to book the ecomony seats seats in the bubble

Thanks for any advice you can given

Economy seats in the bubble for sure! If you can nab the front row, you're sorted. 75A, B, C, H, J and H.

Thank you and appreciate the response