1) what is the difference Echo Emp 1 and 2??
2) what skills retail (Arcane power? and ?:..)?
3) what element (i have water el. gun - I have to change? or ... )
1) Emp Echo lvl 2 is the awakened version of the buff, it lasts for 30min, instead of 20.
2) If you can, Arcane Power. There's no other reliable to keep, anyway.
3) Anything between water/wind/earth/fire. Use the same element stance as your weapon element attribute - always, regardless of what ppl would yell at you.
Most people go Wind, but I recommend you selecting the element you like the most between fire, water, wind and earth. I leveled a wizard from 85 to 97 using Water Stance and I regret nothing (Water's slow debuff from Elemental Crash is awesome against tyrr warriors and sigels knights during olympiad).
I actually use wind, but mostly 'cause I like the shaking ground effect when casting AoE's.
Surprinsigly, I also noticed how often debuffs from stances is getting activated atm when you use elemental crash. Even fear (fire) and root (earth) r landing pretty well now.
@Heatnix, since you use water, can you tell what activate the combo skill when you casting under water stance? Because while using wind, I often activate it while landing the knocback effect from elemental crash (wind), then I can combo with spike to land the Heavy Hit skill, but I dunno if I can activate it when the mob get slowed down by elem crash (water) - which in case would only be possible when doing aerial yoke.