"Recommended" to send all SAT scores?

Hi,
So I’m applying to schools like Vanderbilt and Amherst, who although do not require you to send all of your SAT scores (as they will only consider the highest score), recommend/encourage sending all scores. I took the SAT thrice, first scoring lowly in the 1200s, but the final time it was in the 1400s. So I want to know if it is smarter for me to send all scores or just the best one?

Also, does super-scoring include the SAT essay, as my best essay score is from the exam where I scored the worst.

Thanks!