Preheat oven to 350°F. Line a baking sheet with parchment paper.
Combine flour, salt, baking soda, and baking powder in a large mixing bowl
Stir in ground oats and ground chocolate chips; set aside.
Cream butter, both sugars, and molasses in with an electric mixer until fluffy.
Add eggs, one at a time, and beat on low speed until fully incorporated.
Add vanilla and beat, scraping the bowl as needed, for 1 minute.
Add 1/3 of the flour mixture and beat on low speed until just mixed. Continue with the remaining flour.
Mix in walnuts, pistachios, dried cherries, and mini chocolate chips.
Place six (1/4 cup) balls of dough on a baking sheet. Flatten slightly and top with sea salt flakes.
Bake for 12 minutes. Cool for 2 minutes before moving to wire racks. Repeat with the rest of the cookie dough.