Struggling to fight a banshee, advice requested

[Nanako]

I've reached the point in the story where i have to actually kill a poltergeist, and banshee is the one that keeps cropping up. I got close to victory but several problems appear:

1. The little ghosts swarming me.
According to the book, i need a "Triangular EMP" to fight them off. What is this?
The EMP tripwire doesnt affect them, i can't find any device by this name in acessories or tools.

EMP mines do affect them, i placed a ton of those in the arena, but most of them blew up at once unnecessarily :( and the ghosts respawn so fast

2. My reload time.
I'm using an SMG, and the 2 second reload period is killing me. Since i can't sprint or dodge or really do anything while reloading, and it gets interrupted if something staggers me.
How can i make this lower?

[Kroosh]

I found the Banshee to be a diffucult boss, the screaming, ghost, tentacles, and screen shaking...
Keep searching until you find a Shadow, personally is the easiest or the Kelpie.

[Rato]

the triangular emp is a trap you need traper to use it

[Running With Razors]

The EMP is the EMP trap and you need the skill for it. As for the SMG, grab the appropriate skill and it'll MASSIVELY help you.

The EMP mine won't harm the Banshee but you'll need it for when it spawns the smaller ghosts. A tactic I've found efficient is to ignore the small ghosts and just focus fire on the Banshee, then trigger the mine when you're either in great difficulty or if you need to escape. It's a one-use item but it'll vaporize the small ghosts.

[Alsanthair]

Just spread out the EMPs so you dont activate them at the same time, and stand on top of them what the horde comes

[Neyreyan_Youtube]

https://www.youtube.com/watch?v=6oQQXgx2hUA&index=13&list=PLq7wBqfieZx_1mdXZP43FMLluzYOAfUL1

[Tama]

https://www.youtube.com/watch?v=aWIFQg2XWOA