Summon and machinist for this. 100%. Probably machinist over summon too. Because less competition for the one spot. And there just appears to be far fewer ranged dps players than casters. Bard is also a sought after job and is quite strong with its party utility, but machinist is much more challenging than bard at the moment.

For melee, I'd definitely say Ninja is the most sought after job. Even though it's been (arguably) the best melee job for raid since its release, ninjas are still fairly hard to come by. And it does have some difficulty to it with its different timing windows and with proper usage of its utility.