Tier List Graphic
Although Dragons are playable for a short time, the common perspective is that they function mainly as equipment for Adventurers. This means stat boosts are high priority, with active Skills playing a smaller role in selecting the best Dragons. However, Skills can provide great synergy with certain Adventurers, so each pairing needs to be considered on a case-by-case basis.
Of the boosts available, those to Strength are most valuable to avoid running out of time on boss battles. For healers, this is somewhat different-- HP contributes more to outgoing healing than Strength, so that class benefits from high HP boosts. Therefore, when considering Dragons for healing characters, those with HP boosts effectively move up a tier.