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How to calculate your CRIT value:
Your frost bolt does 456 avg dmg. (not the 446 its supposed to be, don't know why)
A solid preraid set of gear gives you spellpower of 400. 2 crit.
Full Raid consumes of +86 spellpower. (36 from Brilliant Wizard Oil and 35 Greater Arcane Elixir and 15 Elixir of Frost Power)
Frostbolt's spellpower coefficient is .814 (3/3.5 = .857 then .857*.95 = .814)
3/3.5 = cast time
95% -> 5% reduction is because it has a slowing effect.
456 + (.814 coefficient * 486) = 852 dmg per frostbolt.
1% crit would over a long average be equal to 1% more damage per frost bolt. 852*.01 = 8.52 dmg.
8.52 / (spell coefficent = .814) = 10.46 Spellpower.
Then we divide it by current crit chance to account for diminishing returns **
10.46 / (1+ [crit chance = .02]) = 10.26 Spellpower.
At this gear level 10.26 spellpower would be equal to 1% crit, and that would be the ratio you tradeoff your items for max theoretical DPS.
Now lets say you have better gear at a level of 450 Spellpower. +86 from Raid consumables.
1% crit = 10.96 SP
TLDR: Crit-value = FB-Dmg/ 100 / .814 / (1 + crit chance)** Each additional crit has diminishing returns. All of your crit affects your spellpower, so when you add +1% crit, you aren't comparing it to your frostbolt base dmg, but to (frosbolt dmg * current crit chance). So when going from 0-1% crit you do (frostbolt dmg * 1.00). However when going from 99%->100% crit you're comparing it to (frostbolt dmg * 1.99).
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How to value HIT:
You can't go above 16% hit (you get 6% from talents). Base hit chance is 83%. 1% miss is unremovable.
Interestingly, spells are a 2 table roll. First the server rolls to see if you hit, then if you successfully landed your spell; it checks if you made a crit. When calculating hit value, an additional hit can crit and we take that into consideration. Like crit, additional hit makes your spell-power more effective and increasing hit has diminishing returns (due to spell-power becoming worth more).
Crit is not used during hit calculations because it affects the hit and spell-power evenly.
Gear: 400 SP +86 (from consumables) = 486. 0 hit.
852 dmg per frostbolt.
Dmg per frostbolt / Spell coefficient / (.83 + current-hit + .01)
[8.52/.814 = 10.46 dmg] / (.83) = 12.6 sp
At this gear level 12.6 spellpower would be equal to 1% hit, and that would be the ratio you tradeoff your items for max theoretical DPS.
Lets say you have 2% hit?
[8.52/.814 = 10.46 dmg] / (.85) = 12.31 sp
TLDR: Hit-value = FB-Dmg/ 100 / .814 / (hit chance)The more spellpower you have, the more each crit and hit is worth.--------------------------------------------------------------------------------------------------------
So you make tradeoffs on your items until you find your max DPS combination when choosing your items.
Good luck!
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You can check your gear values if feeling lazy (Save it to drive) + can also verify my math here:
https://docs.google.com/spreadsheets/d/1HjDEIyzXBwmH9MQRgQErTuwfJ0plmpy-ZVESJ-75HIY/edit?usp=sharing