I had a lot of luck.
First off me and my mates ended up using the fireballs a lot to get rid of thoughs four navy ships fast.
We got rid of the first three forts easy.
We sailed right past the other forts getting hit rarely.
Then we went down to red getting the last few forsts.
The goliath was very easy!
We got maybe a few shots out of it before it sank.
All in all it wasn't too hard.
(this coming from the guy who disco'd out 6 times and lost 5 times!)