TWS2 is very useless against any skilled pilots, U can NOT control which 2 should be locked and the 2 targets had to be very close in order that U can actually achieve the TWS2, that's very rare in MP consider that R-77 have such short effective range.
Also TWS2 won't give U additional information about the second bandit, and the TWS2 mode will give both enemy lock/launch warning. It don't have any advantage that the AN/APG-63 can give U, plus MiG-29 only carry 4*R-77(2 for ETs), U don't have that much ammo to be wasted.
All concluded that the TWS2 mode is just useless to most situations, don't bother with it.