It strikes me that Slayer's Bracers are bugged in some way on the spreadsheet.
Without any other pieces of Slayer's equipped on the spreadsheet, it's showing as being superior to Thrusting Bands (though inferior to Sinner's Bindings), by a significant 24DPS.
I can't see anything immediately wrong in the stats, and the expertise in either set is not capped.
Granted, moving from a non-Slayer's helm to a Slayer's helm also increased DPS with Slayer's Bracers equipped, but it seems like something must be odd there,
132AP, 38 expertise, 36 hit vs. 91 AP, 18 hit and 17 haste should be a clear-cut upgrade... Only thing I can think is that maybe the haste is just barely enough to make my Deadly Poison generation keep up with my combo point generation:
Slayer's Bracers
White DPS 1568.82 34.75%
Mutilate DPS 879.11 19.47%
Rupture DPS 334.16 7.40%
Envenom DPS 291.54 6.46%
Poison DPS 987.15 21.86%
Other DPS 0.00 0.00%
Thrusting Bands
White DPS 1552.75
Mutilate DPS 863.56
Rupture DPS 336.46
Envenom DPS 293.18
Poison DPS 992.80
Other DPS 0.00
Delta SB - TB
White DPS 16.06837352
Mutilate DPS 15.54613738
Rupture DPS -2.300000886
Envenom DPS -1.635534006
Poison DPS -5.647045136
Other DPS 0
I'm unsure why I'd lose both white and mutilate DPS with the added stats, and only loss of a tiny amount of haste?
Something's wrong here.