Burrbon

I've been trying to get a handle on Spirit and what it means for priest mana regen since I rolled this character, specifically how it translates into Mp5 both inside and out of the 5 second rule. I'm horrible at math and have tried my best to find formulas out there that actually work.

After scouring the net many months ago I came across what seemed to be a working spirit regen formula on wowwiki. Basically it goes like this:

Spirit/4 + 12.5 = Mana gained per tick outside of the 5 second rule

Assuming a tick happens every 2 seconds the trick to converting it into Mp5 (outside 5 second rule) would be:

(Spirit/4 + 12.5) / 2 x 5

From there you just take your full regen rate and multiply it by any modifiers (meditation, primal mooncloth bonus, etc.) to get your Mp5 while casting.

Comparing this formula with the gear I currently have it seems to come out with accurate numbers, based on my armory info, anyway, which says:

427 Spirit - "Increases Mana Regen. by 298 per 5 seconds while not casting"

427/4 = 106.75 + 12.5 = 119.25/2 = 59.625 x 5 = 298.125

418 Mana Regen - "418 mana regenerated every 5 seconds while not casting; 180 mana regenerated every 5 seconds while casting"

298.125 + 120 (mp5 from gear) = 418.125
(298.125).20 (.15 from meditation, .5 from set bonus) = 59.625 + 120 = 179.625

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So my question ..... first is my math correct? second what is the 12.5 added to spirit/4? and finally am I totally missing something or did I forget/omit something important because based on this math Spirit comes out to be a larger contributor to mana regen (even while casting) than I originally thought....

For arguments sake say you have 20% mana regen while casting, take an item with a mere 10 spirit and you end up having

(10/4 + 12.5) / 2 x 5 = 37.5 Mp5 outside the 5 second rule; 7.5 Mp5 while casting. .... this can't possibly be correct, can it?

I need some help here (i was an english major, lol) as i'm going crazy with all this math....

 

Nite_Moogle

Your math does appear to be correct, and yes, with 20% passive regeneration large quantities of Spirit means a lot of in-combat regen.

 

Merple

Think of it this way, every class has a "base" mana regeneration rate. That's what the +12.5 is. You get 12.5 mana every 2 seconds with 0 spirit, then for every 4 spirit, you get +1 mana/2.



And yes, spirit is really, really powerful for a priest. It's not bad in combat, and it's amazing if you can work the 5 second rule.

Also consider that if you use the Bangle of Endless Blessings, (roughly) 15 seconds out of every 60, you'll have 35% regen while casting.

This:
is actually wrong tho. You can judge the effectiveness of spirit with the modifier of +12.5 mana. You only get +12.5 once, at the end of the calculation.

So if you've got 400 spirit, and that gives you 112.5 mp/2, you can't say that adding 10 spirit will give you 10/4+12.5 = an additional 15 mp/2.

It won't.

It'll give you 410/4+12.5 = 115 mp/2 or an additional 2.5 mp/2 (not casting)

 

Burrbon

AH HA! That's the kicker. I've been adding the 12.5 everytime when calculating the effectiveness of an item because I had no idea what that represented.

Whew. I was totally going crazy over that, I knew I had to be wrong, thanks so much, lol.