In order to make sense of the following calculations, I’ll be using these hypothetical stats (instead of x, y, z... variables) :

Tank’s max HP=450K

Tank’s Stamina=21.5K

(amount needed to reach 450K HP when fully buffed)

Block chance=30%

(including 6.36% block chance from the 28% Mastery)

Total Avoidance=25%

Boss swing time=2 sec

Average damage per swing= 40% of Tank’s max HP =180K

(after damage reduction from Armour, Weakened blows and Defensive stance. This amount is based on what we’ve seen so far in past HC content. I’ll detail it if necessary)

With 28% Mastery, while SB is active as previously calculated, 75% of attacks are blocks, and 28% of those are Critical Blocks = > 21% of attacks are critical blocks. This occurs 60% of the time, with a 60% SB uptime.

Without SB 75% of attacks CAN be blocked, and only 30% of those ARE blocked => 22.5% of attacks are blocked, and with 28% CB, only 6.30% of those are Critical blocks. This occurs 40% the time.

== > (60% of 21) + (40% of 6.3) = 15.12% == > so with 28% Mastery, 15.12% of all attacks are critical blocks.

This means, in 6 sec (or 3 boss swings), 0.454 attacks are critically blocked

== > 1 critically blocked attack = 180K * 0.6 = 108K damage reduction

== > so in 6 sec, 108K * 0.454 =49.03Kdamage is reduced on average with 28% Mastery, solely through critical blocks.

Now, 28% Mastery also, provides 6.36% block chance (4.40% Mastery = 1.00% block), which was already included in the hypothetical 30% block chance.

6.36% block chance representsof the overall damage reduction we will be getting from that total 30% block chance, WITHOUT Shield Block. (23.64 + 6.36 = 30 == > 6.36 = 26.90% of 23.64)26.90%

Let’s calculate how much damage reduction that represents.

Without SB and with 30% block chance, only 22.50% of attacks are blocked (because of block being on a 2nd roll)

A part of those blocks will turn out to be critical blocks as we saw earlier (28%), but since we calculated the damage reduction of critical blocks separately, we can't include them here == > 28% of 22.5 = 6.3% critical blocks == > 22.5% - 6.3% = 16.2% normal blocks.

Also, we only want the damage reduction during 40% of that time, since SB is active during the remaining 60%.

== > 40% of 16.2% = 6.48% == > so with 30% block chance and outside of SB uptime, 6.48% of all attacks are normally blocked.

This means, in 6 sec (or 3 boss swings), 0.1944 attacks are blocked on average.

== > 1 blocked attack = 180K * 0.3 = 54K damage reduction

== > In 6 sec, 54K * 0.1944 = 10.50K damage is reduced on average with 30% block chance, solely through normal blocks, AND outside of SB uptime.

== > 26.90% of 10.50 = 2.82, and so2.82K= the damage reduction from 28% Mastery, solely through block chance.

=========== >>>>>> 2.82K + 49.03K = 51.85K damage reduction from 28% Mastery, in 6 sec.

== == >>>8.64K DrPSwith 28% Mastery, through blocks and critical blocks.

This will vary a little, according to your hypothetical stats of course.

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Now, how much Rage would I need to produce this same amount of DrPS, through Shield Barrier ?

SBar and not SBlock because I’m assuming any extra Rage, that isn’t used for SBlock, would be dumped into Shield barrier, since we would be able to keep Sblock up relatively close to the max uptime, if not exactly at the max uptime.

In any case, Rage shouldn’t be an issue in doing so, since all that is needed is 6.67 RPS, to maintain a 66.67% uptime.

I’m not gonna go into details on this part, but once you add Charge and Shouts in the equation, it’s easily surpassed.

So how much Rage is needed for Shield barrier to produce a 8.64K DrPS ?

In the current build, Shield Barrier absorption shield increases with Stamina and AP. However, I’m not sure about what happened to the Attack power modifier, but it seems AP doesn’t increase the absorption amount in any significant way, only Stamina does.

(EDIT: check the post below for more details)

In the current build thus, in most cases, 1 Stam == > (2.5/3) = 0.83 Absorption point, for a 20 Rage Shield barrier.

== > 21.5K Stam (amount needed for 450K HP) = 17.92K Absorption Shield, for a 20 Rage Barrier == >> 1K Absorption require 1.12 Rage.

We need on average a 8.64K Absorption Shield every second, in order to have a 8.64K DrPS.

=== >> 8.64K * 1.12 Rage === >> 9.68 Rage is needed every second to generate a 8.64K DrPS shield.

==== ====>>>>>>9.68 RPSis the Rage per second difference we need between the RPS of 28% Mastery and 22.5% of SS, Rev and Dev RPS, in order to equate the extra survivability we get from 28% Mastery through blocks and Crit blocks.

I was sure expecting a high number, but this is a bit ridiculous.

We shouldn’t forget that this is a pure mathematical and statistic POV, and that in practice, as I tried pointing out in the video, Hit&Exp play a much more important role than what those numbers are actually saying.

Let me know if I missed anything.

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