The last few solo trials in the main story need a nerf... (Lahabrea, Rhitatyn...)

[Lorika]

They don't need a nerf... People just have to stop following the advice : Only do MSQ + Blue Icon Quest for ARR.
Then you'll arrive to those solo duty with the right level and decently geared.

In fact if you do everything (Side quest, combat log + optional dungeon) you can level two job past level 50 before Westwind Cap (you can get your first level 50 between Haukke Manor and Titan) and have around 700k Gils in the pocket.

Which make those solo duty : very easy with WHM and SCH, easy with PLD and WAR, a bit challenging with MNK,DRG, NIN and SMN and challenging with BLM.

They really don't need to be nerfed at all.