I dont think shield mirage would be all that good.1 its a power based weapon, and power mirage aint doing good anyways2 shield is made with chrono in mind ( alacrity on shatter and potential for improved alac ), it has actually insane cooldowns, 35s and 40s, and if memory serves me right shield 4 goes on CD when sec charge is used so more like 40-45s cd on one skill and 40s on another. Skill one is 35s and second 40-10s=30s. U know what happens when mirage gets sustain? Go on Shorts' stream and he will tell you why he doesn't use shield on power chrono. You get rekt by thief, by shiro, by nades, by DH, by necro, etc etc. Combine weapon from one elite spec with another. yeah who knows, maybe it would even make mirage almost meta!!!Mirage and thief are the two classes that are never nerfed enough