Heat remaining 2 tablespoons oil in a skillet over medium heat. Add masala curry sauce; cook and stir until fragrant, about 1 minute. Add parboiled rice and stir to combine, about 1 minute more. Stir in saffron-infused water and 3/4 cup water. Cover, reduce heat to low, and simmer until liquid is absorbed, 5 to 8 minutes. Remove from heat and let stand until rice is fluffy, 5 to 10 minutes.