Q:
What traits should I be focusing on?
Power does very little. You want traits/gear that boost condition damage or ones that boost or apply additional bleeds. Such as hemophilia and enfeebling blood both are in curses and Mark of evasion which is in blood, utilise these to maximise bleeds stacks on your targets.
If you’re using DS regularly for damage, then power will be helpful. I personally put points in Spite on my condition build (which it seems you’re doing with the scepter?) for the increased condition duration as well as the Major Trait that gives Might on Life Blasts. I also like to take either the increased Mark damage or the Retaliation in DS.
The only really “must have traits” are the Curses line for all of the condition benefits that it gives.
The ones that aren’t bugged and actually work.