Are there any items, accessories or abilities which boost the rate at which a unit gains experience through combat?

I often find with new units I summon, that I need to boost them quickly. Other than using Cactuars to give the unit experience, are there any equippable items which give an experience boost?

2 Answers

The Unit Medius (3 to 6 Stars FFBE Unit) Has a Growth Egg as Trust Master reward. Its Description says:

Whoever is fortunate enough to acquire the growth egg will earn battle experience at a much faster rate, as well as quickly gain knowledge of magical spells and abilities.

I haven't mastered it myself, so I might have just traded one grinding for another. Other than that I have seen nothing so far.

Edit
The trust master reward for Nine is Action, which boosts EXP by 50%.

In the Year 1 Anniversary event, there is a reward item 'Anniversary Ring' which has Exp x1.3 bonus.

The two most common are Medius' TMR Growth Egg (an accessory, meaning you can wear 2, and yes their exp boost stack) and Nine's TMR Action which is a materia meaning you can use up to 4 at once.

There's are others but those are by far the most accessible. Here's a link containing more information (and other items as well)

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