I have been doing this alot lately since returning to the game, started sept 15 and leveled my war to 30 in about a 8-10 hour time span, since I was starting from scratch, sold crystals on the ah 3-4 k each on lakshami and within no time I had 2 sets of gear, level 7 leather vest, and the level 10 scale armor set which you can use for almost all the jobs and then upgrade 30+ so your not completely gimp most of the time. I also sold armor from rank 1 conquest points they range from 5-10, I check the ah and see which one cost the most and I buy it naturally, sell and start building some Gil up for later levels. All the armor on lakshami 20-60 usually cost 20-40 10-40k good-flashy , like a pare of bettle earrings +1 compared to evasion earrings at 29.
Sorry about the rambling but this is what I did and it seems like the best way to me starting from scratch,
At the current moment I have a 55 war , 60 bst, and currently in a party at crawlers nest leveling my thf 58 now, comming up on 59. 60 is dancing edge so stoked!,,
And on another note, open up the job dancer and level it to 30, IMO hands down best subjob via ability to save tp to 300 before a tough fight and be able to keep yourself up with your 70hp heal every 5 seconds, I always try to do this after an auto attack to maximize dps. Fights will be longer because no use of weaponskills. Oh yeah you can duel wield at 20 ;w;!!!!