Before (or sometimes after) boss uses its ult skill that requires party members to stack up.

I use to Adlo and Eye for an Eye to Fairy then position her to reach everyone when I use Deployment Tactics.
Sometimes I use Deployment Tactics to WAR (if there is one) because they take our Adlo better than any other jobs.

It's a good spell to prevent overhealing (sometimes Succor is overrated) and bigger shield (than Succor) before boss uses its ult.