I did read that crushing blows by mobs less than 3 levels higher are possible if one's defense skill is less than one's levelx5. Ex. <300 at lvl60, <350 at lvl70.
There is some evidence to suggest that crushing blows can happen when the difference in the mob's weapon skill and player's (level x 5) is 15 or more, and is not entirely based on level difference as explained by Block. For example, level 35 mages and hunters with very underdeveloped defense scores taking crushing blows from same level mobs.
Crushing Blows do occur from attacks by creatures less than 3 levels higher than you, if your Defense skill is less than the maximum for your level (i.e. less than your level x 5). I have seen crushing blows landed on my level 36 hunter by a level 36 Highland Fleshstalker -- because my hunter spent most of his time shooting monsters at range and very little time being attacked in melee, his Defense skill was only 164, which is 16 points below the Defense maximum for level 36.
However, my defense is definitely maxed out at 350, and yet I was hit by lvl72 Hellfire Warders in Magtheridon's Lair with crushing blows. Another tank in my raid also reported being crushed by the Warders.
Did the Crushing Blow mechanics change, or am I on crack, or is my combat log mod bugged (I use EavesDrop)?
The fact that patchwerk doesn't crush and is level 63/73? Same with Loatheb?
The fact that 71's and 72's can crush? The fact that crushings go up if you get UBW'ed and go below 300 defense back when we were 60? Plus i'm pretty sure this is well known.
You want a source? Me. I may be wrong, but searching through wow wiki will only give you the dialogue of C'thun's third phase. You can do the testing though if you like.
Edit: Ok, maybe a bit hostile, but still. You said it yourself. You saw the 72 crush you. Most mobs carry weapon skill based on their level, hence why MOST are +15 skill/% crush. There are exceptions however, and this can't be explained by "level."
Its (Mob's weapon skill - Base defense) = chance for crushing.
If your defense is 345 for instance, your chance for crushing is 20% against a 73.
Patchwerk's weapon skill is 300, hence, he never crushed, even at level 73.
I don't think this is correct, but I'm not certain.
Getting crushed by a +2 is unusual. I'm pretty sure we weren't getting crushed by +2's since the beginning of time. We saw back in Silithus that mobs can have boosted Defense; there's no reason to assume that they can't have boosted skill.
Also, there's no reason to assume that Patchwerk has 300 skill (unless people have crit-less parses after tanking him for extended periods of time with 425 Defense). He probably just had a "no crush" flag, which we've seen with Hydross that they can do at will.
Finally, crush chance scales unsually quickly if you're below min skill. I recall reading somewhere that Druids who tried to tank Vek'nilash would rocket past 100% crush after a UBS.
If it's an isolated incident then it's just the mobs.
If it's all 71-72 mobs then the mechanic has changed.
Which is it? The thread on the R&D boards was giving me a headache. I'm prone to believe the former rather then the latter on the grounds I've tanked most heroics and those 72 bosses at the end don't crush.
I do indeed with a 2.0.0 version of Combat Monitor was out. =/
What is the most important thing to you? Won't you grant me the pleasure of taking it away.
Its very possible I'm wrong, I remember people also claiming Patchwerk was 310 weapon skill, but level alone doesn't mean anything to crushing, other than it tends to work out that way as 315 is 15% crushing for a 60.
Weapon skill should dictate it fully... its also possible there is a crushing blow toggle, but I've been crushed before on many trash mobs... I just don't recall which.
It may be that they design the trash with higher weapon skill, so that the normal hits are mitigated more by the tank's armor, but there is still potential for spike damage. This way healing can be distributed amongst the entire raid via AoE abilities, without driving the raid OOM.
Crushing blows AFAIK can be done by any higher level mob (or more likely mobs with weapon skill > your character level x 5) but are reduced by defense up to character level x 5, with the rate set such that with character level x 5 defense, a standard +2 mob (or +10 weapon skill compared to your lvl x 5) does 0% crushing and a +3 (or +15 weapon skill) does 15%.
This is backed up by the Unbalancing Strike parses on druid tanks. Druid tanks were reduced by Unbalancing Strike far below lvl x 5 defence, and the result that EVERY blow would crush. They couldn't even be crit, because crush filled the table. This proved that defence and crushing blows are related.
A similar argument was the high rate of glances against certain sub-63 mobs in the old days (e.g. elite Silithids), and whether that reflected mobs with a high +def or a "glancing blows" flag turned on. Actually, we could settle that one now and also work out how much +def it is (it's totally +def, y'all) by parsing the glancing rate of 60s, 61s, 62s, 63s and 70s vs those mobs.
The oddity isn't that the Mag trash is crushing.... its that lots of other 72s aren't crushing..... I don't get why heroic bosses at the least don't crush. Anyways, has anyone bothered to see if you glance these guys and don't glance any other 71s and 72s? There certainly used to be a decent number of monsters that were only +2 that would crush me and get glanced, and even some +1s back at 60.
You glance on normal mobs that are even +1 level, but only get crushed by vs mobs that are +3 or higher with "normal" level of Defense/Weapon Skill ("normal" being skill 5x mob level). I'm fairly certain increased levels of glancing blows (such as on some 70 mobs you can glance on, or on Gruul, who has a higher than normal glancing percentage) are based on the mob having elevated defense. And Patchwerk/Loatheb had -5 Weapon skill from a regular +3 mob, etc. This would lead to the idea that the trash in Magtheridon's lair has 365 weapon skill (5 more than normal).
It is more than obvious that different mobs are granted different melee and defensive stats. For example, there are mobs flagged as warrior or paladin types that have Deflection, so they have 10% parry instead of 5% (The Four Horsemen come to mind).