Best way to cook a sirloin tip roast?

I'm going to try this recipe within the next few days:
https://food52.com/recipes/14683-perfectly-rare-garlic-duo-roast-beef

I cook with tri-tip, flank & skirt steak often. How many pounds? Here's basic oven method from the NYT: To oven-roast a tri-tip, prepare meat with rub and refrigerate as instructed. Heat oven to 350 degrees. Add 2 tablespoons of olive oil or other cooking oil to a large, heavy ovenproof pan. On stovetop, heat on high until pan is very hot, then add tri-tip, fat side down. Turn heat to medium-high and sear roast for about 4 minutes. Turn the roast and put it in the oven. Cook it for about 10 minutes a pound, checking with an instant-read thermometer until it reaches 130 degrees for medium-rare.