After tailing them for a short while it seems that we'd reached their target point, where the humans assumed a formation shaped like the letter "U".
As they finished moving into formation each human took one of their two crossbows in hand, erased their presence, and hid themselves.
If you didn’t know about their presence in advance, they’d be pretty difficult to spot even if you got very close to them.
Their hiding skill is very advanced.
Well, it's still at an inferior level compared to us who live in the wild.
Now that they were in position, they had a high chance of silencing their targets without being discovered using a surprise attack with their crossbows.
Since they had two crossbows each, they could fire them both in succession then enter close quarters combat.
That's what I would've done anyways.