Yeah, didn't have time for that during the week. The assumption is that you start near the left edge of the map I posted way back, which I'll go ahead and edit into the latest IC post and also reproduce here, like in the leftmost and second-leftmost row of squares. Except for Pieron, who was moving towards the stream when you all heard the goblins, and would probably be on its left embankment.
So, if you want to rush the goblins instead of shielding the other party members, it's conceivably possible for you to get to the edge of the thickets and shoot at the goblins without them getting the benefit of cover. Only one character out of Heylian, Zuzie, and Kovoir could do that by my count, though, if we're talking making a move and also taking your action.
There's also one more option I overlooked: If you move right up to the thickets, they provide only half cover for +2 AC instead of +5 (you all are also getting this cover against the goblins, but the faster one rolled high enough to hit Heylian anyway). They can also be moved through, costing double movement. So you could also move closer instead of around and mitigate the cover.
If you want to do either of those things, you can keep your rolls and say you hit the goblin (which puts it at 3 hp).