In its simplest terms, damage is calculated as the Attacker's ATK, minus 1/3 of the defender's DEF, adjusted by bonuses. These bonuses include:
- Elemental advantage/disadvantage
- Damage modifiers such as Damage Increase or Damage Cut
- Skills and Status Effects
- Discs modifiers
- Combos, such as Puella Combo
Attack Up vs. Damage Up
Attack Up is generally considered to be superior to Damage Up, as it increases the gap between the the attacker's ATK and the defender's DEF.
However, Damage Up & Damage Increase should not be dismissed off the bat. A 25% Damage Increase will give broadly similar results to a 20% Attack Up, and may be a usable alternative.
Additionally, when considering Memoria setups, players need to consider the opponents they match against. The higher the opponent's defense, the less impact Attack Up will have. In these situations, a combination of Attack Up and Damage Up/Increase may give better results.
Finally, Attack Up as a boost is capped at 100%. Damage Up and Damage Increase, by comparison, are considered separate boosts and therefore can stack to give a much greater bonus.
Defense Up vs. Damage Cut
In the same vein as Attack Up vs Damage Up, Defense modifiers are generally more effective than Damage Modifiers.
Defense vs. HP
Defense is preferable to HP when considering Memoria. More DEF significantly reduces the amount of damage taken. More HP allows for more damage to be taken, but at the cost of taking harder hits meaning the extra HP does not last long.
Which Discs Should I Use?
Players will be limited by which of their team's discs are presented on a given turn. In general, aim for whatever combos are available. Puella Combos are always beneficial as they will set up for Connects.
In a situation where there isn't an easy combo, the JP community have created a chart listing the most effective damage combinations:
Which Magia Type to Use
Considering the most common target types:
- Damage All - better for clearing multiple opponents and Boss units that occupy multiple spaces.
- Damage One - better for single, powerful opponents.
- Damage Random - ironically, the more times these attacks hit, the fewer enemies they are effective against, due to the random nature of the attack. Random hits are not effective for clearing multiple opponents and work best when focused on a single target.
- Attribute Strengthened - better than their regular equivalents where there is an elemental advantage. Most useful when attacking powerful opponents where the players can plan ahead.