Thanks all

So in Legion Beta I decided that bosses will not be killed in around 10-15 secs which was possible in WoD. This was because of the legendary ring, and the generally strong MM spec of hunters. Also the health of the bosses is bigger compared to the average dps that can be put out. Finally the hunter tanking pets seemed to be nerfed to the bottom.

What I'm seeing now and can conclude after some time in mythics:

1) The DPS vs boss health is slightly better than what I saw in Beta. We should be able to finish many mythic boss fights within a minute using Heroism, at an Ilvl of 840ish. Just do some world quests now and then to reach that, no need to spend endless time questing for Maalus or anything else troublesome.

2) Tank pet, and specifically turtle pet was not nerfed as much as in early beta. My Terror is standing strong against many mythic bosses. The healing is still nerfed hard. But as x5 BM we have a lot of spare pets to take some heat before Terror gets up and can be misdirected again. Ressing pets mid-fight and just keep going works pretty fine. Because so much threat is tied to the BM hunters pet, the hunter itself can remain low even when the pet dies. A Feign every now and then is most often just enough.

3) Boss AoE mechanics. I had expected there to be at least 1 bottleneck boss in every dungeon, which a team of 5 hunters just could not survive for a minute. It turns out there are a bunch of dungeons which is just plain doable if you know the mechanics. Hunter healing cool, heirloom shield trinket, and a healing pot comes a long way. Aspect of the turtle can also be used to give some time for cheezing mechanics, ressing pets and positioning in a safe place before it runs off.

4) 7.1 potion of prolonged power. dirty cheap potion, last 1 min, perfect for 1 min fights that we are doing.

5) Theoretically good potential for some selected mythic+. If we find a couple of dungeons which works nice for this setup, a team of 5 BM hunters have a huge potential of completing it quickly. If all mechanics are nailed, a flat %increase is just going to scale together with the increasing Ilvl. Some affixes should also be doable. Bestial wrath has such a small cooldown, it can often be used for each trash pack, allowing a quick pace. A murder of crows are just killing stuff.

I would just like to say that everyone that has a x5 hunter team, and is not doing any dungeons, should try it out.