Luckily I did my Bard first and am now leveling my Scholar with with I am getting sub 5 minute que times every time. Oh and I just remembered that this auto levels my Summoner at the same time nice...just need to go do my Job quests and get my abilities.
But any way I am currently at 56 and doing dungeons almost exclusively...just do FATES in Northern Thanalan in between ques to keep the xp rollin' in...LOL. You only have to do like 5 dungeons to get 2M XP...so it doesn't take as long to level each job to 50 as some people are making out...the ques times would be the only hold up.