Are the pirate units worth using later in the game?

[DGDobrev]

Well, it depends. If you can replenish them quickly and easily, you have completed the 50 no-loss victories, and you are not bent on doing no-loss victories all the time (as pirates and sea dogs tend to die somewhat quickly), you can use them.

Otherwise, they tend to die way too easily. Pirates have only 25 Health and Sea Dogs only 40. On the positive side, the Sea Dogs have 7 initiative, which is great.