Well on my original pirate, I finally mastered out on Grenades. That left me fully mastered.
On my baby pirate, I used it to work on sailing, doll, and a couple other things (like getting from 3rd to 14th level in about a day.
One of my fellow guildies volunteered his war galleon to me and I went hunting high level ships.
262 rep for sinking a ship?
*Headbob* Oh YEAH!
The above image can be clicked on to see the full-size version.