Rolls
First attack & damage - (1d20+16, 1d6+10, 2d6, 2d6)
1d20+16 : (20) + 16 = 36
1d6+10 : (4) + 10 = 14
2d6 : (36) = 9
2d6 : (35) = 8
Second to Fourth attacks (sharpshooter, with adv) - (1d20+11, 1d20+11, 1d20+11, 1d20+11, 1d20+11, 1d20+11)
1d20+11 : (20) + 11 = 31
1d20+11 : (14) + 11 = 25
1d20+11 : (16) + 11 = 27
1d20+11 : (18) + 11 = 29
1d20+11 : (9) + 11 = 20
1d20+11 : (15) + 11 = 26
damage - (1d6+10, 1d6+10, 1d6+10, 6d6, 6d6)
1d6+10 : (2) + 10 = 12
1d6+10 : (1) + 10 = 11
1d6+10 : (2) + 10 = 12
6d6 : (632343) = 21
6d6 : (341151) = 15
crits - (1d6+10, 1d6+20, 4d6, 4d6)
1d6+10 : (6) + 10 = 16
1d6+20 : (1) + 20 = 21
4d6 : (3325) = 13
4d6 : (2545) = 16