No. I'm sorry, but I don't understand what you mean by a single ability. Sure you can always burn recklessness on execute phase and that should skew the execute values up the same, no? That's not what I was after, I was talking about average and how it's skewed. What happens again when you count all hits/parrys/blocks/misses into one and crits separated, then add them up, and divide the crit count from all abilities? How much does the average crit precent look now? Suddently close or under the tooltip value like usual?
But of course, it's always tricky trying to count the average from abilities with fixed increased crit chance by default, like dragon roar, bloodthirst or overpower. You would have to know how to count the additional increased average of crit chance from tooltip when you're using those abilities on cooldown. So it's better to count all others separate first and look how the average looks with and without those fixed abilities and it might give some insight already.
Well, I checked that log. So, by looking Kramix's armory it reveals unbuffed crit 23.67, raidbuffed +5% means 28.67% and maybe add extra 0.03 from 5% allstats buff or something rounding it to ~28.70%.
Now, counting the reported wol numbers with misses/hits/blocks/misses/glancing/deflect (if any) etc. combined and crits as seperate.
Ability name - hits / crits - crit %
Melee: 250 / 99 = 28.36%
Execute: 17 / 9 = 34.61%
Raging Blow: 36 / 21 = 36.84%
Bloodthirst: 24 / 51 = 68.00%
Bloodbath: 100 / - = 0.00%
Raging Blow Off-Hand: 41 / 14 = 25.45%
Heroic Strike: 32 / 14 = 30.43%
Wild Strike: 28 / 15 = 34,88%
Deep Wounds: 97 / 37 = 27.61%
Dragon Roar: 6 / 6 = 50.00% (half missed?)
Lightning Prison: 16 / - = 0.00%
Colossus Smash: 14 / 4 = 22.22%
Stormlash: 25 / 3 = 10,71%
Heroic Throw: 3 / 2 = 40.00%
All combined: 689 / 238 = 25.67% - close to 28.70% when you count in the -3% from boss level.
without 100% fixed hit/crit: 583 / 269 = 31.57% (no bloodpath hit ticks or dragon roar crits)
without fixed and BT: 559 / 218 = 28.05% (no bloodpath, dragon roar or bloodthirst)
Suddently BT's 68% crit chance wasn't that groundbreaking by overall, or was it? Sadly I don't know how to add or count 3x recklessness (12.7% uptime) there so I won't even try to count or check on it. Or even think how to adjust the BT's double crit chance in the calculations for trying to figure out actual average crit rate.
So let's assume wow's combat table will never check the averages on crit, or even on anything... Then I'm just amazed how accurately it works to stay within or under the crit's tooltip value no matter the buffs.