Con 20 and bump Cha to 5.
As you like.
I think we should keep Indefatigable Swim but perhaps alter it slightly to give it a larger than usual carrying capacity.
I'm unsure as to how many turtles pulled each ferry. It could have been several per barge. Also, would they use their "drag" weight to determine how heavy a ferry they can pull? I suppose if it's more than their "heavy load" they won't be able to tow it very quickly.
Hmm, I suppose a
Sled is the closest thing on the Equipment List to a small ferry. They weigh 300 pounds. If we assume it can carry six people like a
Carriage, that's another 1500 pounds or so.
That's 1800 pounds in toto, which is more than the 1200 pound heavy load of a Ferry Turtle, so I wouldn't object to increasing it.
However, I'd rather keep the Indefatigable Swim as-is and modify the Carrying Capacity entry, like we did for the
Xytar (and Camarilla).
I propose one of the following:
Carrying Capacity #1 : Due to their sturdy build, ferry turtles can bear exceptionally heavy loads. Their carrying capacity is 50% higher than an ordinary creature with their size and their Strength. A typical ferry turtle can carry a light load of up to 600 pounds, a medium load of 601-1200 pound, a heavy load of 1201-1800 pounds, and can drag 9,000 pounds.
Carrying Capacity #2 : Due to their sturdy build, ferry turtles can bear exceptionally heavy loads. Their carrying capacity is twice that of an ordinary creature with their size and their Strength. A typical ferry turtle can carry a light load of up to 800 pounds, a medium load of 801-1600 pound, a heavy load of 1601-2400 pounds, and can drag 12,000 pounds.
#2 seems the most appropriate.
EDIT: on the feats, let's definitely drop Weapon Focus and give them Endurance and Toughness as the normal feats.
Increasing the Con to 20 accomplishes the target HP I was aiming for, so it doesn't need the Toughness too.
So, we can use that feat for something else.
Maybe Alertness, Diehard, Iron Will or Run?