just want to copy/paste that article on shadowpriest.com about haste plateaus so SOME PPLZ might finally get a clue. These facts also apply to warlocks btw before you QQ.
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User named frottyy made an excellent graph of the main point:
TLDR summary: Haste Plateaus are garbage. You scale well with Haste regardless of your exact Haste percentage.
Ever since 4.0, I've heard tons of people repeating the myth that DoT-tick breakpoints create "Haste plateaus". This is such a commonly-stated belief that many players take it as gospel truth. (ie, people asking "what's my haste cap" in /g) However, Haste was our best scaling stat in 3.3.x despite the fact that it never added extra ticks at all. It should be fairly easy to show that Haste plateaus don't exist, but I wanted to prove the point.
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1) Gaining an extra DoT tick does not increase your DoT dps.
This is one of the more counterintuitive functions of Haste:
i) At 9.99% haste, you get 5 ticks of VT over 13.64s. (one tick every 2.73s)
ii) At 10% haste, you get 6 ticks of VT over 16.36s. (one tick every 2.73s)
Even though you've crossed a "breakpoint", your VT still only ticks every 2.73sec. The actual DoT damage-per-second does not change. What changes is that you can cast VT less often and still maintain its uptime.
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2) Gaining an extra DoT tick increases your MF dps, but only a little.
i) At 9.99% haste you spend 1.36s every 13.64s refreshing VT. (~10% of total cast time)
ii) At 10.00% haste you spend 1.36s every 16.36s refreshing VT. (~8.33% of total cast time)
Over the course of 163.64 seconds, you will gain 2 GCDs (3.28s) or one Mindflay.
- Let's say you do 24k damage over the course of one MF (2 ticks for 6k and 1 crit for 12k)
- 24k damage every 163.64sec represents a net gain of 146 DPS.
- That is roughly equivalent to 50 Intellect. (consider how tiny this is at 85)
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3) External buffs will ruin your precisely-calculated Haste breakpoint.
Hurricane Weapon, Dark Intent, Power Infusion, Bloodlust, there are lots of buffs that add Haste and can be very variable.
Even just considering Bloodlust, a 40s buff over a 5min fight is a significant amount of time during which your "haste breakpoint" is irrelevant. And many DPSers put hurricane weapon on their weapon, which makes your Haste value highly variable.
Assuming you spend 20% of the time haste-buffed, your "50 Intellect equivalent" haste breakpoint is really only worth 40 Intellect. It is definitely not worth sacrificing better gear to stay at a specific breakpoint.
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Conclusion
Gearing for a "Haste Plateau" is completely pointless. Please spread the word so that people stop talking about mythological Haste breakpoints.