Low level fate grind parties ?

[SuperZay]

Yeah but doesn't give you ANY learning EXPERIENCE with your class it's like semi boosting ONLY for that dungeon

Seeing as level 70 dps don't use any AOE rotations in Expert Roulette I daresay that dungeons don't give any learning experience either. Only Extreme primals and Savage raids give that chance: you are either git gud on your job or you are replaced.