EDIT: slightly updated the build.
I have tested multiple builds since PoF launch in PvP, and based on the current meta it is actually very tough to go full condi with Mirage. Power mirage builds seem to work fine, but I found this build more enjoyable and flexible that is actually a combination of Power and Condi damage.
The idea: The largest damage burst comes from swap + shatter #1 + blurred frenzy. For secondary burst you have axe #3 (can hit REALLY hard) and 2x axe#2.
The synergy between shatter + blind + confusion + torment brings in a lot of condi stacking. In certain sustained fights make sure to keep up spamming axe #2 in combination with shatters to bring in ridiculous amount of conditions.
Also during proloned fights (e.g. 1v1) be sure to utilize torch #4 and #5 then Illusionary Ambush right back and start your chain again. You can also do your opening from Stealth -> torch #4, #5 and then do either bursts. When in danger, use sword ambush #1, Jaunt and Blink to disengage extremely fast.
Your primary condi removal is the mantra, you should usually have it precharged. You also have Jaunt for additional condi removal and obviously the epic Mirage Grandmaster trait.
Any suggestions or observations are welcome. This build should work even better when Illusionary Ambush and Axe skill #3 are fixed and will be working properly every time.