In this post, I want to compare a rotation that involves Disembowel and CT clipping:
HT - ID-Dis-CT-4 -Phleb - TT-VT-FT-4 - (repeat)
...to a rotation that does not involve Disembowel and CT clipping:
HT - ID-Dis-CT-4 -Phleb - TT-VT-FT-4 - HT -TT-VT-FT-4 - Phleb - ID-Dis-CT-4 - HT - TT-VT-FT-4 - Phleb - TT-VT-FT-4 - (repeat)
Basically, I was wondering if and when it would be useful to clip Dis and CT vs. letting them fall off for a few seconds.
On the one hand, if we clip, we maximize our ticks of CT, which weigh in at 35 x 1.15 raw potency per tick, plus extra damage from getting the Disembowel buff on Disembowel and/or Impulse Drive, which comes to 220 x 1.15 x 0.10 (possibly + 180 x 1.15 x 1.10) = 25.3 potency to 46 potency.
On the other hand, if we don’t clip, there is a loss of CT ticks, but with the advantage of favoring our TT-VT-FT-4 combo--which has higher initial potency values--over our ID-Dis-CT-4 combo.
The initial hit damage of our clipping approach is, (170 + 180 + 220 + 250 + 290 + 170 + 150 + 200 + 360 + 290) x 1.15 x 1.10 = 2884.2 potency across 10 GCDs.
The initial hit damage of our non-clipping approach is ((170 x 6) + ((180 + 220 + 250 + 290) x 2) + ((150 + 200 + 360 + 290) x 4)) x 1.15 x 1.10, or (1020 + 1880 + 4000) x 1.15 x 1.10 = 8728.5 potency across 30 GCDs, minus the loss of Disembowel’s bonus on Dis and/or ID’s hits. I’m guessing that, for typical levels of Heavensward Skill Speed, ID gets the Disembowel bonus but Dis itself does not. As we saw, that’s a loss of 25.3 potency per Disembowel, of which there are two. So, 8728.5 - (25.3 x 2) = 8677.9 potency across 30 GCDs.
SO. We should be able to construct an equation that tells us when clipping is or is not worth our time, based on Skill Speed:
((2884.2 potency / 10 GCDs) x (1 GCD / X seconds)) = [(8677.9 potency - ((40.25 potency / 3 seconds from an HT-buffed CT) x ((30 collective GCDs between CTs x (X seconds / 1 GCD)) - 60 seconds of CT uptime))) / 30 GCDs] x (1 GCD / X seconds)
In other words, we want to take the potency per second of the initial hits for clipping, then compare it to the potency per second of the initial hits for non-clipping minus the penalty we get for missed ticks of Chaos Thrust. Let’s solve the equation for X, which should tell us the threshold of GCD length underneath which NOT clipping Chaos Thrust (rotation #2 above) will be a benefit.
When I solve for the equation, I end up with an X-value of 2.0629 seconds. In other words, holy shit, we are never going to have enough Skill Speed for a non-clipping approach to be worth it. (A rudimentary check of the numbers does suggest that ID’s initial potency receives a Disembowel bonus at this GCD length, whereas Disembowel itself does not, which is consistent with my mathematical assumptions.)
Now, to beat a dead horse even further: keep in mind that Disembowel buffs our auto-attacks, in addition to the damage of any bard(s) or machinist(s) in our group. This means that those tiny pockets of downtime, even the ~1 second or so that we would have at a 2.13 second GCD, would cost even more than this equation suggests.
Conclusion: HT - ID-Dis-CT-4 - Phleb - TT-VT-FT-4 - (repeat) is officially our new GCD rotation.