i posted an epic one about this and e tear trough, which is
about three years of tweaking about i have come to the conclusion that totally masking it and setting it with powder if you're over 35 is counterproductive for daytime makeup.
so i don't use primer and have ditched any powder, such as LM brightening powder to set the two concealers.
i use the merest merest swipe of a corrector (eve pearl salmon but have used bobbi brown corrector) and press it in, then with small eyeshadow brush use concealer two shades lighter in the shadow (trough) of the bottom of the dark circle, or what is in some the beginning of an eye bag. work it in with finger.
this way it doesn't crease but won't completely cover it but still looks much better. the amount of product i'd need to completely eradicate it would make me look 900 years old by lunchtime.
look at some 1960s beauties, such as madeleine smith and jean shrimpton, they had dark circles and still looked gorgeous.
illamasqua nude pen on waterline can refresh if you look knackered as well.