Well when I hit 50 I didnt worry about snipers right away, though ofcourse it was on my mind. First I leveled ninja up to 20, and then leveled thf to 40 (w/ninja sub ofcourse). Once that was out of the way I continued leveling to 55.
From 50-55 I spent my fair share of time in Ordell's Caves, when the old gil seller crew was there (Dokyii, Beocheo, Nuki, Oain, etc.) so it was rough but I did manage claims and a couple of rings then. I used those proceeds to work on gobbie bag 1-4, or whichever bag has your max at 55 and also used it to do all the mogsafe expansions.
At 55 I bought a few of the RK armor set with conquest points and the rest I bought with gil, they were all just about 100k a piece or so, then. At 55 I continued with better luck in Ordells Caves. It was like right after they did that huge gil seller ban. The Ordells crew was gone and ofcourse every player and their mom was swarming the place at first, but after a while it died down to only a few regulars. Me being one of them. I had lots of claims.. far too many.. but drop rates suck balls on the stroper chyme, so I ended up getting about 2-3 more rings (after a few weeks of camping) and used that money to buy myself snipers, and new earrings as well. Then I went back to leveling.
I stopped at 58 to farm for a Hauby, went to Ordells again to try my luck. Still had a pretty good claim ratio even when the new gil sellers started to show up. Though, they soon got the pattern down, and would kill the chyme off in under a minute or so (which reduces the overall time you'd be waiting for a spawn, thus increasing the amount of times it would spawn). When I did get claims it always would take me 2-3 minutes to kill it. I eventually got tired of these new gil sellers and stopped going to the caves, unless for some reason I did a search in Ordells and they weren't in the area (this did occur a few times).
I switched to farming tiger fangs and mythril beastcoins in Beaucidine Glacier. It's a pretty isolated area, and there are a decent amount of tigers there, and they're lined up pretty nice. They just arent as easy as the ones in Battila Downs. I'd kill the tigers, and every 5 minutes fight a gob and attempt to steal mythril beastcoins from them. Usually staying till I got atleast one stack of coins, by this time I'd usually have several stacks of tiger fangs (as stealing with /thf is teh sux, but it works... sometimes). Somtimes id luck out and even if steal didn't work a beastcoin would drop after i killed a gob.
Needless to say, this was and is a very time consuming way to farm, and not really all that great of a gil/hr ratio. It will get you gil though. On the way out through Battila Downs I would finish off whatever stack of fangs I had left on the tigers there then head to jeuno.
I now make my gil doing something else.. that's already way too crowded and competitive most of the time, but I find it works, and doesn't take nearly as long to make a bigger profit than my fang/beastcoin run would. Will I tell ya how, no.. but if you search for me, you can probobly take a guess.