Costume Gears: Usable or Unusable in GVG areas?

[The Roger]

Another example:
WOE is confusionary, when the numbers are high.
BG is challenging, when the numbers are low.

Why in WOE the guilds try to rush with tons of people the other defending guild? To flood them with so many different skills, of so many different elements, spammed so thightly one onto the other, that the assaulted (hopefully for the attackers) cant put proper countermeasures to them.
The attackers wants to lay this kind of confusion on the defenders: because you cant play around/against it for longer.

BG instead is more: study your enemy and react properly to it, because the numbers in play are way lower. I think you can see the point without any further explanations (this if i was able to explain sufficiently clearly<3)