The virtuosu is great but there are some small things that needs to be changes.
1- bladeturn requiem isnt clear on when does the block ends does it end after the crystal bubble disappear or after the swords disappear it is not easy to know.
2- please just change the condition traits for virtuosu just make it a pure power build like you did to the mirage as a pure condition build, you can change them to decrease the recharge on dagger skills and when stunned use psychic force to break stun and push enemies or put some traits that apply quickness.
3- blade call needs to be faster when hitting the target and when comming back its slow and can easily be avoided if some one just moved or at least increase its damage.
4- unstable bladestorm is so slow i really dont think its worth using causes its slow and does not do alot of damage i know its and AOE but still its so weak and slow it needs to be faster and increase its damage but the main problem is that its so slow.
5- phantasms health needs to be increased or make rhe immune to damage until the finish their actions beacuase in WvW and PvP the get interrupted or die before finishing or even before starting their action so if they die immediately then i can not generate blades and i wont be able to use them in WvW and PvP also the if you made the phantasms invulnerable until they finish their attacks it will help when we use the trait that allows the phantasm to throw a dagger after attacking but if phantasms die then this trait will not be used by any one.