Level 80s who single target groups of mobs

[Mahoukenshi]

There is no duty in-game that forces people to use AoE in order to clear it.

MSQ and/or Job quests should have a duty where you need to kill a group of mobs ASAP. These mobs have very low HP & attack, you can kill them easily by using your AoE combo 2 or 3 times. If you don't kill the mobs in 20s or less, they enrage and the duty fails.

The development team needs to start introducing duties that help the player base improve their gameplay.

Seeing how the jobs get their first spammable AoE at different levels, the best option would imo be during job quests. Otherwise, you'd need to wait for quest level 40+ until DRG and WHM gets their first spammable AoE attack, which may or may not be too "late" for some avid learners (or frustrated vets ).