How do Measure weapons work?

I have made Balthier a Machinist and White Mage, so he has access to Measures.

These seem to be very low fixed damage weapons, which apply buffs on hit. I have tried using one and manually having him attack my other party members to apply Protect.

However in the wider context of the game, they seemed entirely pointless, until I found one which applies Bravery on hit, which is a nice buff I don't currently have access to.

The only premise I can think of is swapping to this weapon, manually applying the buff and then changing weapons again. I don't know how you'd Gambit for them either. If you set an 'Ally: Any => Attack' you could apply Bravery, but the character would not deal any damage to enemies, because you wouldn't have 'Enemy: Nearest => Attack' due to applying Bravery to enemies.

It swapping weapons just to buff the only viable use for Measures, or am I missing some mechanic in their use?

I am playing the Steam release of FF12 Zodiac Age (2018)