BE Hunter - Started north at 18th lvl with a new trash pet (spider), main pet stabled. Skulked around the ruins for two days, killing nagas and collecting 38 pet figurines (including a one-shot that will also spawn a ghost saber to fight for a couple minutes) before finally getting the saber to spawn. Tamed on the first try, though I will admit I was a little surprised at that point and had to ditch the temp pet (now up to Best Friend and both of us lvl 19) fast.
Suggestions: Get to east side of ruins away from road and get up on hillock. Use
Eagle Eye to spy around ruins until you find figurine respawn, then skirt ruins and kill nagas around the area to clear. Put your temp pet on Stay and Passive nearby. Make sure
Dismiss Pet and
Tame Beast are on an action bar. Switch to
Aspect of the Monkey and drop a
Freezing Trap, then click the figurine. You'll either get a little
Cat Figurine (stacks 20 per slot), a one-use
Glowing Cat Figurine combat pet token (not the Ghost Saber you are looking for), or a
Ghost Saber that will attack (and stick in your freeze trap). Dismiss the temp pet, start the tame beast and even with crits and crushes, you will finish the tame before it kills you.
Feed to happy level before the spawn timer runs out and the pet auto-dies, so that when you raise pet it will only be a little unhappy. Enjoy!