Petrified Scale Heroic vs Skeleton Key Comparison!
First of all, its been a while since I've posted, but I'm alive!
So I did some calcs here regarding the Petrified Twilight Scale (heroic).
If we look at armor vs stam, armor is around 11-14 per 1 stam in terms of effective health on pure physical fights. If we use a median value of 12.5 we can say that this trinket gives around ~2060.8 stamina:
2576a/12.5aps = 206.08s
206.08s * 10 = 2060.8 health.
Comparing this to the only other real trinket being used in that slot (Skeleton Key - I saw this in terms of LK cooldowns for Reapers, Satrinas is another thread!), you are losing ~21.92 stam. However, you have to take into consideration that at this gear level, raid buffed, this trinket will bring you to about the armor cap. In my full physical mitigation set it puts me at 40k armor UNBUFFED. In my regular gear unbuffed, around 36k. That is roughly a 70.23% reduction in physical damage in my normal gear alone!
Now to look at the proc compared to the Key's absorb.
We'll use my stats as a base:
19.13 B - Ab 1803 per
The Key, if used on CD, absorbs 6400 damage. 2 minute CD.
Scale, if you DIP below 35%, you gain 828 dodge rating. 45 second internal CD.
So, in my gearsetup, if I dip below 35% I gain 10.28% dodge.
This will make my avoidance a cumulative 61.1%. Factoring in block, defense and parry: 90.43% unhittable, compared to my normal setup of 80.43%
So on proc, an 83 boss has a 9.57% chance on hitting me, and if he does hit me, I will mitigate 72.7% of it unblocked. 72.7% - 1808 if blocked.
If we use unbuffed numbers, and my health of 51, 506:
So lets say a boss hits me for more than 35% every time (lets do 36% for the sake of simplicity): 32,963
Over the course of a 5 minute fight (300 seconds) if you were getting hit roughly once per second and the trinket can only proc every 45 seconds, it will proc 6.67 times, so lets just say 7 for 10 seconds. So it will have a total uptime of 70 seconds out of 300.
If the boss hit you EVERY time, no avoidances, he would do 9888900 damage.
That is a 23.3% uptime on the trinket. So for 23.3% of the fight, you will be near unhittable, use shield block at the same time and you will be completely unhittable. If the boss does not hit you during this time you will avoid 230413.7 damage. In the event you are hit, you will take 9813 less damage, unblocked.
So, worst case scenario, with this trinket equipped, and not avoiding anything, you will take 9813 less damage 23% of the time.
Lets compare this to the key:
6400 damage every 2 minutes. In a 5 min fight this is only useable twice. This would absorb 12800 damage total over the fight. But, you are only 80.43% unhittable.
For purely physical based encounters, the Scale wins, being 90-100% unhittable, while worst case scenario still absorbing 9813 damage less for 69 seconds of the fight.
The Key is still great for when cooldowns are on a set rotation and magical damage is involved.
I think its a cool trinket to use, especially on LK H tanking (not adds), and other physical encounters. It's late, so if I fucked up my math or it doesn't make sense I'd love to know!