Level 50PLD and kill these guys in Batallia downs really easily. I've been selling in Jeuno AH for 9000 a stack but 600 gil tax so... GOnna turn them in for quest from now on.
EDIT: At about 56-60+ I plan on changing to Beaucadine Glaceier for tiger fangs. They drop much faster there on Tundra Tigers.
So far I have farmed these in Jugner Forest and in Battalia Downs. I must say that battalia downs Sabre Tooth tigers drop rate is much better then jugners. I am a level 43mnk/17th(for TH) Taru and i can take about 4 before having to rest and they always drop the tooth