Some monsters have a “Thrash” mechanic and can proc multiple attacks against players in a very short duration.
Note: Most of these monsters can also “store” these procs and unleash them all several seconds later.
An example of this is the Princess Theradras encounter in Maraudon.
The Princess will store her attacks if kited and can land several attacks instantly when she catches up to her target. This behavior is consistent with the reference client
You may be on to something… but it’s also an ability bosses have had since MC.
This is the spell used by Sapphiron: wowhead /spell=19818/double-attack
What looks like is happening, when comparing to Sapphiron’s DPS parse logs from before the batching change
is that double attack previously had a ~400ms delay between the two hits, and now it’s much much closer than that.
00:00:34.399 Sapphiron Melee Optimist 2427
00:00:34.808 Sapphiron Melee Optimist Dodge
00:00:20.214 Sapphiron Melee Optimist 2541
00:00:20.637 Sapphiron Melee Optimist Miss
00:00:28.372 Sapphiron Melee Ewarlia 2167
00:00:28.822 Sapphiron Melee Ewarlia Parry
00:01:17.361 Sapphiron Melee Ewarlia 3376 Crushing
00:01:17.789 Sapphiron Melee Ewarlia Dodge
00:01:41.258 Sapphiron Melee Ewarlia 2312 (B: 132)
00:01:41.665 Sapphiron Melee Ewarlia Miss
00:02:02.364 Sapphiron Melee Ewarlia 2455 (B: 132)
00:02:02.763 Sapphiron Melee Ewarlia Dodge
00:03:12.122 Sapphiron Melee Ewarlia 3546 Crushing
00:03:12.511 Sapphiron Melee Ewarlia Dodge
Analyzing Sapphirons attacks pre-patch, rarely are two attacks ever landing in a very close window.
Double Attack is a lot more consistent with the small batching window, based on logs. Logs above are /reports/2GqVLfamQkbZCgJH
/reports/HjrK9TxfC37QWtB
/reports/JxZdPrDCLvKjYzhy
It turns out Sapphiron got buffed as a result of the small batching window, and probably other bosses with Double Attack or proc spells, thrash, and things of that nature.
While not outright seal-twisting and using the abilities from two different phases at once, it does appear tanks should expect to take burst damage in narrower windows of time from bosses.
Sapphiron wont be the only boss parsing 100’s on tanks with the batching change.