Nars stays hidden from the goblins, but makes sure the party can see him. He points toward where the goblins are while drawing his sword and holds up 3 fingers. He points to the goblins, then to his own eye, then to the party. He then points to himself and makes a circular gesture. Then points at his companions and gestures towards the goblins again.
Assuming his companions don't look totally confused, Nars sneaks off again to try to circle around behind the goblins.
OOC: As much time as they have adventured together, I'd think they could communicate pretty quickly and effectively with gestures, but I'll leave it up to Erekose how much information Nars is actually able to convey.