Well, after doing so deep dive test runs on using accessories, I did find some interesting trivia that relates to Defense teams, so I figured I'd share an idea or two on how to best set up a Defense-Ability unit.
From what I can tell, you only need a Defense stat equal to 25% of a pest's Attack power in order to reduce incoming damage by 50%. On the other end of the spectrum, you need a bit more than double the pest's Attack power in your Defense in order to completely negate all damage.
So my tip on using Defense Abilities is this: either include only a bare minimum in a squad to get the best efficiency out of the Defense mechanisms, or go all in and attempt to raise your Squad's Defense to make them a walking Fortress.
Now, if anybody here knows the actual equations that make Defense in this game tick, PLEASE tell. It's been a nasty headache for me.
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Oh, and since the value of Defense is entirely based on the Pests' Attack, I'm gonna repost these numbers from the other thread.
1. Among our current 45 5*s, a Lv70 (Max Affection) Knight's average Defense is 2203
2. Among our current 45 5*s, a Lv70 (Max Affection) Knight's average HP is 12,376
3. Stage 12-5's Pests have an average Attack of 2500
4. Stage 13-5's Pests have an average Attack of 5000
5. Stage E14, ?-8's Pests have an average Attack of 8000
So this formula is wrong? Or the calculation will be vary depend on your the different between ATK/ DEF