How would you design the Necromancer ?
You’re essentially asking about a generic Necromancer, not what a GW2 Necromancer is. It looks to me like you played WoW or something similar and are thinking that is what Necros should be.
How I would design them?
easy answer: follow the gw 1 necromancer design.
my answer: Different builds for the necromancer should be: Debuffing/control, Healing, Minions (sturdy and suicidal), dps through dots.
I would make sure the necro can have an easy access and high uptime chill/cripple/weakness with some immbolilizes and fears, but at a cost to the necro. Maybe like corruption they get the debuff, and apply it to the enemy.
The healing focused necro should have access to short time revives, revive for 30 seconds then they have to down someone, a channeled full revive, sacrificing life force to heal an ally, stealing health from the enemy and applying it to allies.
The minion necro should have either – high cd yet sturdy and very damagaging minions, or low cd, weaker, swarmier minions. Either have a life force cost or require bodies.
The dot dps necro should bleed, poison, torment and slow enemies. Also a stealth capability that costs life force over time.
As a last type, a pure deathshroud necro who can stay in for a long time and applies effects in a radius as long as he is in. Basically plague form, along with abilities like those that currently exist.
Basically allow better control, more choice in the type of MM, stronger DS, party support, but not all at once and with the life force bar as an energy resource.
short post, but a “feel” of the dark magic of the necromancer makes me love curses and self inflicting blood magic. GW1 is definitely my top 3 favourite necro. However GW2 has a childish, non (evil?) feel to it.
EDIT: 9/10.5 says one of my most badly worded post
I’d love to see the GW1 concept of curses make a return. Allow us to cast Spiteful Spirit again (instantly puts an end to thief/warrior DPS spikes being OP, and all the people balling up all the time). Allow us to cast stuff like Life Transfer, which remains on an enemy and continues to steal health, while we use other attacks. These were the key strengths of the necromancer in GW1. They were really nasty. Their strength came from the diverse effects of their spells, which could have devastating effects on an opponent’s defenses. Also, disease was a really nice condition to have.
(https://www.youtube.com/watch?v=D-On3Ya0_4Y)
http://wiki.guildwars.com/wiki/Necromancer
^This is a necromancer..
http://wiki.guildwars2.com/wiki/Necromancer
^This is a very weak substitute.
E.A.D.
http://eq2.wikia.com/wiki/Category:Necromancer
This was a fun Necro to play;
http://images1.wikia.nocookie.net/__cb20101031183731/eq2/images/7/7e/Necromancer.jpg
80 Ranger (3), 80 Warrior (3), 80 Thief (3)
80 Ele (2), 80 Engi (3), 80 Rev (2)