I would have to agree largely on the pets needing something to fix their AI, combat, AOE avoidance and their cooldowns. I have settled with using the staff after testing: Axe / focus, Axe / Dagger, Dagger / Focus, Dagger / Dagger. I stopped there after trying the staff being that I found it sup to all other weapon skills with what skill point skills I was choosing. I tend to roll with Staff, Well of Blood, Well of Darkness, Bone Fiends, Shadow Fiend, Lich Form. This usually works well for leveling as I can take on a Vet plus adds or more solo just fine.
I find using the Bone Fiend explosion as more dps from them exploding than alive and dying. The shadow fiend is there to hopefully take some hits or draw aggro. I can pump out some burst dps if all CDs are up but once they are down, I tend to trail off until they are up. I am currently in blood magic and death magic with reduction to staff, wells, and increased marks as my select-able traits. It would be nice to have some single target dps or something.
I also remember necro in GW1 being a ranged class but 2 of the 4 main hand types are close quarter combat weapons. Hell the scepter is only 900 range where the staff is 1200. Somethings do need to change with the necro.
One suggestion is to make the wells like a bubble around the necro where you could make the well mobile and take it to allies making grouping up much more powerful. This would add increased dmg to mobs that get knocked back or move. It also would add to the concept Anet is trying to do with the combo of skills.
I feel Lich from is a very powerful ability with a relatively small cooldown for an elite skill. It could use some love though like the jagged horrors die way too fast. Remove the degeneration of health from them or something. Also reduce the cast time of the marks would help to maximize the 30 secs you have in that form.
I used to use weapon swap in my rotation using the other weapons cause you needed the dps while one set was cooling down, but since switching to staff, I dont even bother cause the 2nd and 3rd abilities are much more dmg output than other weapons generally than to be locked out of the staff for 10 secs.
As for death shroud, I love this ability and idea, but the only one I find very useful is life transfer. I find myself shifting out after I channel it because the fear nets me no dmg as well as the #2 ability (forgot the name). The only other one I find useful is the Life Blast but that does less and less dmg the less life force you have. I even dont use this ability unless my life force is above 75% due to my staff and WoD and bone fiend explosions net me more dmg. I also use death shroud as an oh crap button to reduce taking massive dmg to my health pool.
All in all, some minor changes and I could see necros being very good.