Guild Wars 2

Hi!
Please tell me, if i want to make this armor: PvP Corrupted Orrian armor
http://wiki.guildwars2.com/wiki/PvP_Corrupted_Orrian_armor
i must have concrete lvl pvp (for example higher at 20?) or i can make it on each lvl?

HI!
I have question about this fragment of guide:

“The playstyle utilizes leap combo finishers to keep most of the buffs up. Illusionary leap and swap are a total of 2 leap combo finishers. Dropping temporal curtain then using both skills on top of it generates around 14 seconds retaliation. A full 3 clone (illusionary persona won’t increase the time here) cry of frustration will generate around 15 seconds of retaliation. Between these 2 skills and the token retaliation from chaos storm, you can easily have 100% uptime, even against someone stripping the boons.”

I understand that when i use COF on 3 clones i get 15sec Retialation, but how i cen get next 15s by leap and swap??
Sory for my english…:]