For 6 pounds of steak? Sheesh, man! Invite 5 friends over!
I can offer a quick rub recipe:
1 tablespoon cayenne pepper
1 tablespoon garlic salt
2 teaspoons ground allspice
2 teaspoons ground coriander
1 teaspoon ground cumin
lightly brush on some extra virgin olive oil, work that rub into the steaks, hit them with a dusting of kosher salt on each side and let them sit for 20 mins at room temp.
Throw them on a hot grill, and turn them 45 degrees without flipping them over after 90 secs to 2 mins. That's how you get the cool crosshatch grill marks
Flip them after another 2-4 mins, depending how thick they are, then give them 3-5 mins total on that side for med. rare.
Let 'em rest at least 5 mins before cutting into them, preferably ten.
JV