Guild Wars 2

Heya, I was messing around and found an epic vulnerability build for mesmers, and with 3 illusions the diversion shatter can get an instant 25 stack of 13s vulnerability on 5 mobs in a group. check it out

http://gw2skills.net/editor/?fgEQJARWlwzao3UTqGg9IBqHgf7cn0DYz6TXqAuB-jwCBofDRjWOQZPFRjtKqIasqaER1qkYGdIWdQmdA2dwmeZVKAIWGB-e

Weapons:
- Great Sword
- Staff

Utility:
- Eather Feast (heal 5798 + 664 per illusion)
- Signet of illusions (recharge all shatter skills)
- Mirror Images (summon 2 clones and break stun)
- Null Field (remove conditions from allies and boons from foes)

Traits:
- Domination 30 {4,7,12}
- Dueling 10 {2}
- Illusions 30 {6,2,12}

Overview:
- 3 vulnerability (9s) on interrupt
- 1 vulnerability (14s) for each illusion shattered
- 5 vulnerability (13.5s) when dazing
- Shatter skills remove 1 boon from foe for each illusion
- 5% increased damage to foes not using skills (inactive)
- 50% chance to inflict (1s) stun when dazing a target
- vigor (5s) on critical hits
- Phantasms have fury(10s)
- all shatter skills inflict confusion(5.5s)
- Recharge all shatter skills at 50%hp
- Shattering illusions grants 1 might(10s) per illusion
- Cry of Frustration grants retaliation(5s) per illusion
- Reduce recharge of illusion summoning skills by 20%
- Diversion hits 5 targets in a large area

Pretty much easy to do, You will have +80% condition duration to keep vulnerability up for 10s at 25 stacks just by using diversion shatter with 3 illusions, 5 targets are hit and can have 14 to 25 stacks, but the main target will have a full 25 stack of vuln. use signet o illusions to recharge when needed and illusionary invigoration will pop at 50%hp for another recharge. Good for soloing in wvw, bad for teams with lots of vul appliers. Im still tweaking the build, post questions if you have them.