New strategy applied here compared to the run from Cortez (Where he took Morgan Black to collect all 3 Navigation Charts). I just drop off Morgan Black at the enemy base and let him collect the Navigation Chart there (Which failed very often, the dude was constantly dying there...), meanwhile I load my units and Settlers (Acquired from deploying the Town Center) onto the ship and drop them off at the 2 other Navigation Charts. Settlers can collect them too, just as fast as Mr. Cool Irish Talking Dude. Of course they're not very capable of killing the Treasure Guardian so that's why I send my other units with them. This way, I don't need to travel Morgan Black all over the sea, and Navigation Chart 2 and 3 are collected at about the same time.