Originally Posted by
Kirin
Power Breakdown should have a higher multiplier. And it has the bigger effect too.
If you have a Hero Soul laying around somewhere, it may be worth it grab a good Paladin/Knight character (Beatrix, Agrias (who can also Spellblade 4 for elemental weaknesses), Paladin Cecil, etc) as Dark Knight Cecil has a pretty terrible skill set. They generally have white magic 4 or 5 to bring Pro/Shell in an ability slot and contribute to damage output.
I wouldn't say shatter Flare Strike, as the recent buff made it pretty strong, but as mentioned it doesn't hit any elemental weakness.
4* abilities will help you advance content more generally than pouring everything into weaker honed 5*. Breakdown abilities for support skills, 4* elemental spellblades and -aja black magic, a well honed Curaja (with the occasional backup healer Curaga) will be all the healing you'll need for a long while.
Oddly Potent 1-3* Abilities:
Boost/Faith
Haste
Esuna
Launch
Tempo Flurry
Drain Strike
Utility 4* skills:
Ruinga
Quake
Pro/Shellga
Curaja
Slowga
Valefor/Madiun
Banishing Strike
5*'s to R2 Quickly:
Full Break