Xebec's plan was so good when you think about it, it's almost a shame it didn't end up succeeding
> By himself he was already strong enough to infiltrate Marijoa, going all the way to the Chamber of Flowers, confront Imu and live to tell the Tale, even defeating an admiral as a side quest while escaping the holy land
But his adventure in the Holy Land made him realize he needed something special if he had to take over the Imu's throne.
So:
> He formed an unstoppable crew with multiple top tiers(or future top tiers) in it with the ambition to crush the Navy, take over the holy land and becoming King of the World
> Aimed at 2 legendary dfs, hoping for Harald to eat one of them in attempt to have Elbaf forces under his command (a key point that even Imu is attempting to have atm), and most likely to have control over the Galley-la shiprights to gain control over an ancient weapon(Pluton)
When you look at this, you can truly feel like he had all prepared for his move to actually work
Shame that all of this fell apart because there was no teamwork in the Rocks pirates crew, with everyone doing what they like, backstabbing each other, all that while getting gangbanged by Marines+Roger pirates+CDs(Hks with Gorosei around, maybe even Imu)