Runes:
+4 illusion (sup + headgear)
+1 fastcasting (not nescesary but greatly enhances the spiking ability)
+1 insperation for some extra health
The build isnt too hard to use:
- put on Illusion of weakness before battle
- Put fragility on your foe.
- cast the skills in the order up to virulence.
- wait till they die.. (which is usually fast)
Basically you have to cast all spells as quick as you can on your foes. Because of the conditions in the end Fragility will do alot of minor dmg wich kills your allrdy a bit degenerated foe.


There is also a GW:EN variant:

Add shatter delusions to end Shrinking Armour faster and force the victim into Cracked Armour

yea i used drain delusions also for the energy