here's terraria's defense calculation
it highlights a huge issue i have with a lot of defense systems
say you are fighting an enemy with 30 defense (like a mimic) on expert mode
if you attack it with a single 100 damage attack, you will deal 100 - 30 * 0.75 = 78 damage
if you attack it with a 4x25 damage attack, you will deal 4x (25 - 30 * 0.75) = 10 damage
this means slower, heavier hitting weapons are just naturally the strongest in the majority of situations since almost every enemy has a decent amount of armor
this is also true in >>712360067 dark souls 1 of course