Case study: Splitting 66v3 or not @ RC7 Double deck

[Secretariat]

I am more interested in the hand 3,3 vs 2 and another one 6,6 vs 2. If they are against a 3, I alway split when DAS is allowed.

Splitting 66s v 3 is technically the right play most of the time but you should be aware that even at RC0, there are deck compositions where hitting, or even doubling down, is the better mathematical play.

The question here however could be stated like this. Is it worth not splitting 66s v 3 early in a rich deck with the objective to maintain a high count?