Just something I came up with after sparring with Hellbat Schilt in the RP. These are the parameters to Xander's Elemental "Weaknesses" depending on which Biohancements he's using.

Elemental Weakness Descriptions:

Null Element: This spans Model-P's kunais, Model-X's buster shots, and Model-Z's saber slashes.

Fire Element: This spans any form of fire attack, such as Model-F's Megaton Crush.

Ice Element: This spans any form of ice attacks, such as Model-L's Ice Dragon.

Electrical Element: This spans any form of electrical attack, such as Model-H's Plasma Hurricane.

Elemental Weakness Ratings: .5's represent a marginal modification of damage as opposed to other Biometals.

1.0 = Normal Damage
2.0 = Double Damage
3.0 = Triple Damage

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Model-B: Normal Mode

Null Element: 1.0
Fire Element: 1.0
Ice Element: 1.0
Thunder Element: 1.5

Model-B: Model-F Biohancements

Null Element: 1.0
Fire Element: 0.5
Ice Element: 1.0
Thunder Element: 3.0

Model-B: Model-L Biohancements

Null Element: 1.0
Fire Element: 1.5
Ice Element: 0.5
Thunder Element: 1.0

Model-B: Model-H Biohancements

Null Element: 1.0
Fire Element: 1.0
Ice Element: 2.0
Thunder Element: 0.5

Model-B: Model-P Biohancements

Null Element: 1.0
Fire Element: 1.0
Ice Element: 1.0
Thunder Element: 1.0