I've been to pickup shouts myself to help friends.
As you may see my main Jobs are not what you would call DD,
so they are not accepeted most cases.
However in pickup honestly i always see that Heavy DD
Wearing a Lvl 80-90 Weapon doing no dmg at all.
Then even my Jobs woul've been a better pick.

If your ppl do know what they do and you have enouth supporters.
I dont see how you would lose tbh. If you still lose you...

As mean as that may sound... should check your pt members
As in Delve even if someone is good at their Job. Gear does matter.

But if all is good gearwise ... maybe your stategy isn't fitting for the Group?

And if its for Keyitems you could always try to beat said NM in a Fracture
as someone perviously mentioned, you will have a longer timelimit to kill it.