Board Thread:General Discussion/@comment-25688484-20160608064055/@comment-26243141-20160608075741

In my opinion, there's only 2 occassion where abilities are useful. They are the Nightmare Rift or Belly of the Beast Event boss encounter. So I invest my scrolls on units that are excels on these mode.

The goal of using scrolls is to get your maximum burst damage during burst round as soon as possible. Therefore, depends on your party combo, on general there's 3 abilities that's worth noting. Flurry Boost, Elemental Boost, and Skill Chance.

An example combo would be Raikou (flurry boost), Ellifer (null Boost), and Valentine Scathach (skill chance boost). By using this 3 abilities on same turn and burst out, you'll easily reach maximum damage potential in 1 turn, resulting in huge damage to BotB boss or instant death on Nightmare Rift boss.

Of course this can depends on your main Flurry burst hitter. For example if you're using Tishtrya, you only need another flurry boost for it to work because Tish herself got Water Boost ability.

Another ability worth noting are cure all (Gerhilde for example), or charge burst gauge (Vasuki). The former lets you live for another 2-3 turns to do another burst, while the latter lets you burst faster (duh!).

This is only my experience though, feel free if anyone got a better suggestion :)