Echo – Manipulation. 1c, 60r
Illusion summoning skills summon one more illusion.
(Has no interaction with Deceptive Evasion/Desperate Decoy, etc. In the case of using it before an untimely death; Deception will spawn two downed clones instead of one. As for the duration, anything over 10 seconds makes it potentially too powerful I would guess.)
Illusionary Weaponry – Summon. 1.5c, 120r
Every five seconds summons one of three illusionary weapons that follow the Mesmer.
~Illusionary Scythe – does an AoE sweep that damages and has slight knockback
~Illusionary Rifle – fires a volley of projectiles doing low damage with a chance to daze
~Illusionary Horn – clarion call duration-based area of effect that gives random buffs to allies and random conditions to enemies
(Duration would have to be lowish as well, but 30 seconds sounds ideal. The weapons cannot be targeted, however. To balance out having too many summoned allies on the field, the weapons are replaced one after the next.)
It was the first album I thought of when I learned about the Sylvari.