what about this one?

HIDDEN BARRIER

the best way to destroy someone is to make him take damage from 2 barriers at one time. To succeed, you need to place a barrier right behind another. The only way to not destroy the previous barrier is going through it, using shield. So get enough bar to have enough shield time, pass over at least 2 pads, go through a barrier with your shield and boost at the same time with your 0.3, you will leave a barrier right behind the first one. This requier a lot of timing to have your shield when you go into the barrier, and a lot of timing to boost and leave the barrier as close as possible to the first one.


*that's just an idea*
can't try it now, and don't know if you keep your shield when you boost...