Hybrid Necro (Scepter/ Dagger + Axe/ Focus) can stack vulnerability just as well as any Engie. While maintaining more potent bleeds (BiP) on more foes (Epidemic). Also can offer support to a team via wells; AoE Heal, AoE Blind, AoE Condition conversion etc... all while being far more durable than an Engie.
A Necro is the first class I'd pick (given I had the choice) to do anything.
Assuming you're bringing BiP and Epidemic on your necro, you're limited to Well of Blood and 1 other well, while with my engy I can carry an elixir gun and offer an aoe heal and regen and another elixir for an aoe revive (elixir r), aoe offensive buff(elixir b ), aoe condition conversion(elixir c), aoe stability or stealth (elixir s), or a combo field(elixir u). On top of this I can carry elixir h for an aoe defensive buff, and if I want I can drop the elixir gun all together for another one of the elixirs above. Not to mention supply drop for another aoe heal and an immobilize and a bunch of med kits.
At 1500 range you have plenty of time to move out of the way if you draw aggro, which isn't as easy at 600 range on your axe. At 600 range you are also in range of many large aoe attacks from bosses in dungeons. Also with the axe out you lose a bunch of bleeds to build up your vulnerability, while with grenades you build up both bleeds and vulnerability at the same time. Within 6 or 7 throws of grenades (happens relatively fast) you've applied 20+ stacks of vulnerability and bleed, along with poison and ice. With an auto-attack chain -> grasping dead -> enfeebling blood -> BiP -> dealthly swarm -> epidemic chain, you have 8 attacks to get a similar amount of bleed spread around, but none of the vulnerability to the group.
I won't disagree that if something gets to you necro is more durable because of death shroud or the fact that it is possible to get more powerful bleeds from necro stemming from BiP and weapon stats having meaning. But in my experiences playing both classes as condition classes, engineer is easier to apply those bleeds and get the number higher faster with better vulnerability spam, while necro offers slightly more condition damage and a better spread of conditions through epidemic. I prefer engineer for this role, but I do play my necro as well for it as I enjoy both play styles.
Edited by matsif, 19 January 2013 - 07:50 PM.