Advice on EC's that I'm thinking of including in my list of 15, and also LoR's?

Stats:

GPA: 3.63

MCAT: 509 (127/127/127/128)

*Side note about the LoRs: My school does not offer a committee letter, so 3 of my LoR's are coming from individual science professors.

Here's a list of past experiences I'm thinking of including:

These are probably going to be my "top 3" experiences:

• 3 semesters as a TA for my university's Human Anatomy Lab, which included both teaching students and dissecting cadavers for classes. 2 of my LoRs will come from this...

Advice on EC's that I'm thinking of including in my list of 15, and also LoR's?