Quote Originally Posted by MagicSpice View Post
Even my Fire team has more HP than that...

6500-8000 is low. Hell, I got double that on my light team due to so many dual weapons for light.

But it sounds like you're on DMM, so I can't really help much on that. I'd check the DMM wiki to see of there's anything you might be missing
I managed to clear the Jack-O GO today after some weapon upgrades (HP increased to about 9,000-10,000 after 2nd limit-breaking the heavenly treasure vigor weapon) and using Barong as main for increased dark resistance. However, I did not manage to clear with five survivors. Barong is available from the epic quests so I'd have to say that progression is really a lot faster on DMM for newbies as long as you grind like hell. The first release for the Heavenly Raid was for light and dark, while the wind raid was more recently released.