It respawns, just teleport away, do something else and come back...
Takes a while but not that hard to get the rings...like I have said though, bows in gneral aren't that great and I am not excited about the choices of arrows we have...

Ok i just found out what the probablem. If anyone is interested the thing is no.matter how much you try you really wont have any luck getting the moon ring with out the dragoons monograph. When i got it, it took 5 mins to get all 3 rings.

not gonna lie .. moon rings worst item to try and get in the game .. grand helm grand armor .. cake walk compared to moon rings. . u jus keep fighting helv near stairs an chaining till u get drop easy and towers same chain easy , stupid monagraph bs drop for moon rings .. I spent 6 hours 4 hours at highwaste restarting if I didnt get drop and 2 hours in crystal chaining em even tho chains dont effect it i did it for drops anyway .. still not a single moon ring ..worst drop of any ff game I have played

^Worst? You've clearly never tried for the Danjuro. Takes a long ass time just to get the Larva Eater to spawn.

quote FF12 Grand Master

I have 99 Danjuros and 51 Yagyu Darkblades

I've had 99 of both before. Took *bleep*in ages <_<

What are the stats of the Danjuro? Does it make it worth getting?

It's the best dagger (80 attack; but that doesn't really matter). Put it on a character with high speed, and it kicks ass.

its pretty simple really, if you go to the great crystal alot u can get a map on the net. once u have the map go to the great crystal and u can find the ash worm in the triangle between where the leo 2 and gemini 2 gates are, if you go around youll see at the top the waystone xv, there is a ash worm in that area just keep goin around in circle, well in a triangle actually! that is probly alot easier than the highwaste where u have to keep shuttin it off, that would get really old. OH AND MAKE SURE YOU HAVE THE DRAGOONS MONOGRAPH (VERY IMPORTANT)!