ummm... maybe you all should try alt+r (turns run off) and see what happens when in stealth mode... thats how i got my first Predator mark with app1 sneak. couldn't have gotten it done with app1 any other way, maybe its the same for ranger class. dunno haven't made it yet.
I used adept 1 Hunt and made it past everything in there except the wandering patrolmen up on top floor and one lvl 25 bored guard behind a door on second floor, and I was lvl 18 at the time. I was able to get past the lvl 25 bored guard using the lvl 18 trait that puts you into a hide mode, can't remember name but think it may be called "Stealth". It only lasts like 1 minute or so but you can stack it with Hunt adept 1 and get past just about anything that would be aggro even with Hunt adept 1 on. Pretty awesome skill I think. The quest bow is pretty nice, except I don't like that the range is 10m less than the easy Gregor's Old Bow quest that you can do at lvl 7 or 8ish. I think this bow should have a much higher range on it than that, just my opinion.
If you wait till level 19 you can do this with Hunt App I and don't have to worry about upgrading it for a while (like, till level 22 when it starts to go whiteish)
One small warning... Down at the brewery in Black Burrow there is a door that exits to Antonica. DO NOT exit through this door. It leads to a cave that is full, I died to fast to tell what kind, of mobs that see through sneak and hunt. I died before I could turn around and zone back out. While attempting to recover my shard, I found the entrance to the cave through a long underwater tunnel. Looks like I might have to eat this death because if i stick my head up out of the water, I'll surely have another death to deal with. I should have just Called to Q once I was done. The exit seems to be a safe place away from roaming mobs to cast Call to Q. Save some time and exp debt, don't pass through that door.