every top unholy dk on warcraft logs uses comet’s trail and death’s choice. When I try to look for upgrades your software always tells me to use different trinkets, even if I change the time and amount of buffs I have. I think your software does not calculate how much haste interacts with Gargoyle.
If you could give us a snapshot of your case we can take a closer look. Instructions at the end of this post.
I don’t know how a different trinket ranking leads you to assume that we don’t calculate haste’s impact on the gargoyle’s attacks… we most certainly do include it.