I only have BLM and MNK at 50 and though my MNK has much better gear I always do dailies on BLM. It's fast and easy. Melees will deal less damage when you can't attack from the correct position (while solo) which gets pretty annoying. MNK in particular never gets to maximum attack power solo unless you're chaining enemies. With BLM most enemies for daily quests take about 3-4 casts to kill, so somewhere around 10 seconds. You can also sleep all the enemies that are in the way of you interacting with quest objects. It can certainly be boring though because BLM has very little to keep track of outside of their own mp (and really you just can't cast fire anymore if you get too low -- hard not to notice). In regular combat they have 1 DOT and a 'rotation' that mostly consists of spamming the same spell repeatedly. It is fun doing a ton of damage in bursts, but not terribly exciting in dungeons, etc. but that's what you have PLD for.