Zodiak Weapons : Are you casual content or hardcore content?

[Zaels]

Here is how I see it.

Zodiac weapon path - Skill Level: Low, Time Level: High
Leviathan EX weapon path - Skill Level: Moderate, Time Level: Moderate
Second Coil weapons path - Skill Level: High, Time Level: Low

If you don't want to take a skill-based path or spend a considerable amount of time on it, you don't need an i100 weapon.