uberCuber
Legend
Since the best time with 1-look OLL and 1-look PLL is somewhere between 4 and 5 seconds, the best possible time with 2-look OLL and 2-look PLL should be somewhere between 6 and 7, I guess.
Yep, you're right. 6.73 is the fastest that can be done with 4LLL, any faster is impossible.