If you are playing a night blade with a bow it all depends on your stamina:
-More damage
-Constant damage = More damage
But you'll surly need some health to be alive so you are able to DO damage
I'd say you put about 10 points to health and the rest to stamina.
This way, and by the night blades stamina reg + stamina gain (warrior guild skills as well) you can fight long fights in dungeons and do a lot of damage constantly.
Youe can spend points in the champion system to need less stamina for your skills, raise your stamina reg and need less stamina for blocking too. This way you are able to block in big enemy groups, do AOE dmg by using e.g. the double wield skill "Steel rain".
Everything else is about the healer then and maybe the Templar throwing some stamina reg shards here and there ^^