To clarify, I'm unlikely to be the one playing Infilitrator.
It's someone else's skill I'm concerned about.
To be blunt, I have no idea if the player I'm looking at is an expert Sniper or a walking disaster waiting to bring the rest of the team down.
In this case, if I see this players' handle again, I'm going to avoid them on general principle, having seen the problems they bring twice already.
Feel free to correct me if I'm wrong, but based on my own personal observations, you have to hit a Banshee with sustained or rapid fire/damage in order to achieve a quick kill.
Because you have to carve through their biotic barriers and then do the same again for their health bars.
Pretty much every Sniper Rifle I tried is a slow fire rate weapon, with the exception of the Collector one.
I've no doubt that given time, you can snipe them to death, but every second a Banshee is alive is one more second for them to put their fingers through your spine.
And then you're out until the next wave.
Add in the ability to teleport right up to you or behind you and it gets even more dangerous.