probably all speculative bullshit.
If you're just spamming HS, that means you have 2 GCD's that aren't getting used. How could ignoring devastate, HELP your tps, squeezing in those 2 devastates INTO the 2 Gcd's will boost your tps, guaranteed. there's no mathematical logic to not devastating to help your threat. It's bs imo.
And if you see 2k threat on Omen, that means he's only putting out like 1.4 or 1.5, omen only relies on the last 10 attacks or so and divides it by the time he's been sitting there, that's why it looks like he has so much threat because if he's skipping devastates, his last 10 attacks will look something like: SS, rev, hs, hs, SS, rev, hs, hs, SS, rev
with ss and rev being the single highest threat moves it'll show up much higher than if the last 10 moves looked something like:
SS, rev, hs, dev, hs, dev, SS, rev, dev, hs