Formula to "Review" Alternating Shift Schedules

[davidcox9]

Hello,

I have rotating shifts that I would like to create a formula to tell me to review or be blank if the days are showing correctly.

Here is an example

Date	A and B Shift	C and D Shift
14-Jul​	ISBLANK($G12),ISBLANK($H12),ISBLANK($K12),ISBLANK($L12),$G12:$H12<12,$K12:$L12<12	ISBLANK($F12),ISBLANK($I12),ISBLANK($J12),$F12<12,$I12<12,$J12<12
21-Jul​	ISBLANK($F12),ISBLANK($I12),ISBLANK($J12),$F12<12,$I12<12,$J12<12	ISBLANK($G12),ISBLANK($H12),ISBLANK($K12),ISBLANK($L12),$G12:$H12<12,$K12:$L12<12)

So week 1 I want A shift to look at Mon, Tue, Fri, and Sat
But then week 2 I need it to look at Sun, Tue, and Wed.

My actual formula is this

IF(OR(D12=$T$2,D12=$T$3),IF(OR(ISBLANK($G12),ISBLANK($H12),ISBLANK($K12),ISBLANK($L12),$G12:$H12<12,$K12:$L12<12),"Review",""),IF(OR(D12=$T$4,D12=$T$5),IF(OR(ISBLANK($F12),ISBLANK($I12),ISBLANK($J12),$F12<12,$I12<12,$J12<12),"Review","")

T2 and T3 are A and B Shift
T4 and T5 are C and D Shift

Any help would be great if it's at all possible.