I prefer getting tam tara and sastasha (or ifrit ftw hi2u 180k for 8mins) I can get my 200k+ exp (Lv. 45) for 20mins work vs getting 120k plus the 60k bonus when I get SV for 45mins work. If you want more exp from the dungeon queue specifically for the highest you can enter . The Duty roulette gives you a bonus based on the difference in level between your level and the dungeons level to make up the difference in exp lost per mob but time wise its MUCH more time efficient when you get a low level dungeon that can be done in 15-20mins than getting cutters cry which can take an hour or more (if your group doesn't abandon it and make you re-queue completely) after a single wipe.
I am quite happy with how the duty roulette is now I have gotten runs of higher level dungeons and honestly when I get them its not always because someone hasnt done it before it means someone was smart enough to queue for that specific dungeon for exp and you got dropped into the first available dungeon someone was looking for in specific. That and most of the higher ones simply arnt worth the time (AV I would be better off joining one of the 90 PF groups looking to farm it for exp than DF it and wipe to golem for 30mins before someone uses vote abandon)