Quote Originally Posted by Kitty View Post
D'artagnan's gun "Charles Blaster"

Applies ATK↓ and DEF↓ (B Frame -20%) to all enemies
★ (Charles' Blaster) Adds ATK↓ and DEF↓ (D Frame -10%)

meaning: -30% ATK/DEF debuff to ALL enemies. great for beginners on thunder.
Yup. Thunder is so low on debuffs that this is almost your only source of them. Add in Ambush as EX skill for Dartagnan and enjoy the -50% Def.

Note that for all other elements, you shouldn't even consider the defensive (HP) weapons. They're really, REALLY bad when compared to the offensive (Elemental Atk) weapons.