Mana Management Test
In this post I will put down the results of my experimenting with my current spec, trying to validate the choice between using Meditation or Focused Mind as the talent to govern my mana efficiency. For this I will use two World of Logs reports for the same fight (Lich King) to allow for an easy comparison.
In my current gear, I have the following unbuffed stats (so without Inner Fire or any other self-buffs, flasks or the like):
2987 Spellpower, 33% crit, 25% haste, 72 MP/5.
To keep the comparison easy, I also do not have any items which have a Haste proc, meaning that my Haste is a constant.
The fight as it is for me
The Lich King fight is the only fight where I can say that mana can be an issue. A mis-timed Shadowfiend, forgetting a Dispersion or similar human mistakes can mean that I end up without mana half-way into the fight. My goal to myself is making sure that at each transition phase I am at about 75% mana – that should allow me to pull through.
A lot of Shadowpriests have both Meditation and Focused Mind, and they will never have any real mana issues. But ever since my mana did not seem to run out, I slowly put less and less points in Focused Mind until I ended up in my current state. This was fine up to now – but with my low Spirit and relatively high Haste, combined with the mana issues on LK, mean I have to re-evaluate my choice.
So there will be two short pieces of math here (and you can repeat those for yourself, in your own gear situation) to help me decide which talent to take, and which one to ditch.
Test 1: Lich King, 29/3/2010
Talent: 3/3 Meditation, 0/3 Focused Mind
The first thing I did was look at my “active time”. This represents how long you’ve been actually doing anything. For me this was 3915,3 seconds (one hour and five minutes). That active time represents 783,06 “MP5 moments”. In other words, you can divide your active time by 5 to determine how many “ticks” of mana regain were in your active time.
I gained the following mana returns from abilities, calculated their MP5 value and the “ranking”:
|Glyph of Shadow Word: Pain||49494||63||5|
|Judgement of Wisdom||23417||30||6|
|Hymn of Hope||2701||3||8|
Mana Leech is my Shadowfiend, by the way. As you can see, Meditation’s a big source of mana, but by no means the biggest. This shows why being smart when using your Shadowfiend is so important. Revitalize isn’t always there (it’s a RNG thing) and sometimes I also have a Mana Tide Totem nearby.
After that I checked how many spells I cast of each kind affected by Focused Mind, how much they would cost in mana without Focused Mind, and how much mana they would cost with 3/3 Focused Mind. Then I multiplied the number of casts I made for each spell with the difference between the two mana costs.
The last step here is then to divide the Mana Saved by the number of “MP5 moments”, in other words my “Active Time” divide by five.
(Number of casts)*(Mana Cost normal – Mana Cost FM) = Mana Saved.
(Mana Saved)/(Active Time/5) = Mana Saved per 5 Seconds
In other words, during this particular evening I would have effectively had 224 MP/5 in savings if I would have had 3/3 Focused Mind. When you subtract the 120 MP/5 I gained from Spirit while raid-buffed, it means a net gain of 104 MP/5.
Test 2: Lich King, ??/??/????
Talent: 0/3 Meditation, 3/3 Focused Mind
This test is next up, and will involve doing all of the above again, but this time without Meditation and taking 3/3 Focused Mind. Then I will be able to see if the theoretical gain mentioned above actually works.
<More to come!>