What episode does Luffy fight Gecko Moria?

What episode does Luffy fight Gecko Moria? Episode 372 | One Piece Wiki | Fandom.

Who killed Gecko Moria?

After the war, he got attacked by Doflamingo, who received orders to kill him. As Moria laid bleeding on the ground, a laughing Doflamingo claimed that he was far too weak to be a Warlord of the Sea and that it would be better for it to look like he died honorably in the war.

Is Nightmare Luffy stronger than Gear 4?