So, if it’s an issue of finding the real one, everyone should learn to turn off everything but player nameplates, real mesmer always visible unless a clone is almost directly in the middle of your screen. Done.
There the secret is out!
“I’m sorry, my responses are limited. You must ask the right questions.”
- Dr. Alfred Lanning, fictional character of great intellect.
Hey everyone needs to know it, not just the people on the Mesmer forums 
Seriously though, I was tired of seeing all the QQ in the Mesmer forums and put it every profession forum for good measure, easier access for everyone.
“I’m sorry, my responses are limited. You must ask the right questions.”
- Dr. Alfred Lanning, fictional character of great intellect.
This will likely be patched. Don’t hold your breath.
Havok Legion [HL]
Fort Aspenwood
When I started, I was all ZOMG which one which one WHICH ONE gah!
With experience, and a second to look, now I go, oh, that one. I have great hope that as I get better, I’ll get even faster at it. Which is sort of how everything else works.
Zestee, Cryptician Zetti, Zissi The Jack, Zi Mao,
Ziffy Snidehide, Zadie Hawkkin, Zannie Oakley, Zuulja
[ODIN],[NaCl] – Tarnished Coast
The real mesmer is the one dodge rolling, has a off hand weapon, doing mind stabs, and phase retreats inside of chaos storms, illusionary waves etc.
They are always easy to pick out honestly. Especially as a thief since they are trying to find you too lol. Its usually the same rotation with a Sword/whatever mesmer after iLeap and blurred frenzy 9/10 they dodge roll backwards.
[Good Fights]Sinndicate{Ele}Sinactic{Engineer}
Sinnastor{Warrior}Sinnacle{Mesmer}Sintacs
{Thief}
This will likely be patched. Don’t hold your breath.
If thieves can use it it will be patched
Shawtell, Zen Verani, Rayshia Howen, Iyado, Colace Nzoir, Arteel Fyrien [Teef]
I didn’t though, it’s in the Mesmer forum from which the quote comes from, 
You are right however I did forget to repost it there, maybe you can do it for me, I’m gonna go play! = )
“I’m sorry, my responses are limited. You must ask the right questions.”
- Dr. Alfred Lanning, fictional character of great intellect.