Priest Theorycrafting – Critical Rating (Part 5)

v3.1

1. Introduction
2. Mana regeneration
3. Mana pool
4. Haste rating
5. Critical rating
6. Summary

There are three areas which are affected by Critical Rating. There is the base 50% additional healing which results from a critical and then there is then one talent for each of the healing schools which is crit based. These are Divine Aegis for Discipline and Surge of Light for Holy.

Assumptions:

• Flash Heal is being spammed (1887 base heal, 80.86% co-efficient. 1.5s cast time)
• Discipline has 1950 spell power
• Holy has 2147 spell power
• 45.91 Crit Rating equals 1% Crit
• 167 Intellect equals 1% Crit – Due to Disciplines Mental Agility talent they only require 145 Intellect per 1% Crit
• 30% over-heal
• Divine Aegis is 70% consumed.
• Surge of Light procs are 70% consumed
• Inspiration prevents 5% damage (for 25% armour buff) and has a 40% uptime

Base Critical value

Healing spells that critically hit heal the target for 150% of their normal healing value. To calculate the value of this additional healing we assume that the caster is using Flash Heal and use the attributes associated with that spell. To determine its value as MP5 we equate the total heal for the FH as MP5 based on the SP to MP5 ratio (0.6) and then calculate how much is additional healing is due to the critical. Over-healing is also taken into account.

Soul Warding nerf

v3.1

Here comes the first nerf of Disc, but probably not the last.  As Kitts pointed out Soul Warding now only reduces PW:S mana cost by 15%.

T’was bound to happen.

Now back to our regular programming.

Priest Theorycrafting – Haste Rating (Part 4)

v3.1

1. Introduction
2. Mana regeneration
3. Mana pool
4. Haste rating
5. Critical rating
6. Summary

Calculation of the MP5 value of Haste Rating was a bit trickier and I feel the assumptions made are a little less robust than for mana pool, mana regen, etc.

Assumptions:

• Flash Heal is being spammed (1887 base heal, 80.86% co-efficient and 1.5s cast time)
• Discipline has 1950 spell power
• Holy has 2147 spell power
• 32.8 Haste Rating equals 1% Haste
• Caster currently has zero haste. The effect of moving from 0% to 1% haste is slightly greater than moving from 6% to 7% haste. However the effect on weighting is very small.
• 30% over-heal
• Borrowed Time and Serendipity have been ignored as only FH is being spammed.
• Latency and Surge of Light procs are ignored.

Firstly we calculate the MP5 value of a Flash Heal. We calculate this so we can figure out how much an additional FH, enabled by haste, is worth.

Priest Theorycrafting – Mana pool (Part 3)

v3.1

1. Introduction
2. Mana regeneration
3. Mana pool
4. Haste rating
5. Critical rating
6. Summary

Next we look at mana pool and abilities which effect mana pool. There a number of parts to discuss in this post. Base mana pool and calculating the effective MP5 of a static mana pool for a specific fight duration is first followed by Replenishment, Shadowfiend and Rapture for Disc priests.

Assumptions:

• MP5 for mana pools is based on a 6 minute (360s) fight over which the entire mana pool is depleted.
• Discipline has 1092 Intellect
• Holy has 950 Intellect
• Replenishment is assumed to have an 80% uptime and returns 0.25% of the mana pool every second.
• Shadowfiend returns 5% of the mana pool per hit and strikes for an average of 8 times per use. It is only used once per 6 minute fight.
• Rapture returns 2.5% of the mana pool each time it procs and does so once every 15s. In theory it can proc every 12s but this seems unlikely in reality.

Mana pool

This is also called maximum mana. To calculate the MP5 value of this firstly we need to calculate what the mana pool actually is. This calculation is fairly straight forward.

Priest Theorycrafting – Mana regeneration (Part 2)

v3.1

1. Introduction
2. Mana regeneration
3. Mana pool
4. Haste rating
5. Critical rating
6. Summary

Before I get into mana regeneration I will mention two best guesses that are used in my model.

Spell Power

Firstly I continue DwarfPriest’s weighting for spell power (SP) to MP5 of 0.6. This is effectively defining the relationship between mana equivalence points (MEP) and healing equivalence points (HEP) used in other models.

I am yet to discover any evidence for this or any other ratio between HEP and MEP. DwarfPriest alludes to having previously calculated this somehow (see Spellpower vs Mana section), but I am unable to discover how she did it.

The 0.6 SP = 1.0 MP5 is very important to the model and adds a lot of sensitivity to it. A number of other stats are calculated based on this ratio and changing it changes their weightings also.

Spell power MP5 value = 0.6

Holy priests also benefit from Spiritual Guidance (SG), which adds 25% of their spirit as spell power.  They also get 5% extra spirit from the Spirit of Redemption talent.