Heroic dunegons and 5m setup

[Baltyre]

Really interesting post, i didn't consider the Pal + 3 hunter + Healer option before.
Is the Druid a viable option as a dungeon healer for this team ?
It's because, on the open world, i will probably main a Hunter+Druid.

If yes, witch spec ? Is a dreamstate druid doable for extra dps ?

The other issue is that i initialy thought of getting a mage in my team, use the $$ boost to lvl 58 and use it to boost my other team-mate all the way to 60.
I will not able to do that now, so what is the fastest way to level this team ? Use the boost on the paladin ? But i guess it need specific gear like ( https://discord.com/channels/2629764...21684705378314 , https://discord.com/channels/2629764...22200914755615 , https://discord.com/channels/2629764...22200914755615 ) to do boosting.

Still, even without massive AOE boosting, with regular dungeon grinding, will i be quicker to gain level thought dungeon with a lvl 58 boosted pal as main than a regular non-pay-boosted team ? Or the xp malus will get in the way ?

Bonus questions :
- I read that pet take 50% less damage on AOE, does that open some strategy on some boss to let the 3 pets tank ?
- Does Ferocious inspiration stacks ? ( When your pet scores a critical hit, all party members have all damage increased by 3% for 10sec. )