Issue: sigils/buffs & phantasms
I think a sigil 25 stack to increase phantasm damage would be a little over the top. Anet has already taken steps to knock down the damage from phantasm builds. If anything, I’d say perhaps change Signet of Illusions to be worth using more. Something like " increase phantasm hp and on activation, phantasm damage is increased by 200 for 10 seconds". Even that though, people would freak out and call for a nerf.
Black Ops supply line disruptions.