The logic of how I do my Maplestory key bindings.
Somewhat class-specific but the logic can apply to other characters like a template.
Disclaimer: Dependent on what your keyboard actually looks like.
TLDR (Flexible):
Function Keys (F1, F2, etc.): Toggles "Set it and forget it. / Forgot to set it."
1-5: Buffs
Home, PgUp, Del, End, PgDn: Burst Buffs
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W, A, S, D: Movement (A is Jump, W is Up-Jump, S is Dive, D is Dash)
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Shift, Ctrl, Insert: I-Frames / Defensive Utility (Disclaime
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F: Main mobbing skill (Spamming the most)
G: Main bossing skill (Spamming the most when locked in.)
B, V, C, Q: Short Cooldown Skills / Burst Rotation (Flexible)
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R: Key Hold-down Skill (ie. Tempest / Flexible)
E: An attacking skill that usually follows the Hold-down skill (Flexible)
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Z, X, Y: Utility Skills? (ie. Blink, Bind, Hookshot etc.)