I know when I first got limbo, I didn't know it could banish allies, I only saw it instantly killing mobs and since abilities give 100% exp to the frame as I was leveling, I used it. No one told me otherwise either. It wasn't till I got on discord with my usual partner, in a duo team, did we find out all these mechanics.
Also, don't get mad if you randomly run into melee range at the same time I've already started the cast animation. Since learning of the ally banishment mechanic, I aim for mobs not near allies, but it never fails that some yahoo comes jumping into the blast after it's a