Typo or Missing Info: Companion's Fury rank 15 and rank 16 have identical descriptions. Checked three times, but still couldn't see anything different looking at the Current Rank vs. Next Rank descriptions. I think rank 17 has an identical description too. My guess is that the AA gets extended an additional 12 seconds for ranks 16 and 17 and it is simply a typo on the duration or the extension amount.
You'll want to identify the class, as there are multiple versions of those ranks which are class-dependent.
For rank 15 to 16, the boost is duration increase. I am not looking through the other 100+ ranks to see what each rank does, but here's the link. It looks like maybe the description could use a bit of work, as the duration increase's text portion doesn't appear to accumulate as one might expect. https://www.raidloot.com/aa?name=companion's fury&effect=&class=Mage&tab=&exp=
I appreciate that. I did see the raidloot so wondered why I did not see the description change. It seems to have fixed itself either by zoning or relogging. So Fury 20 shows the right effects.
