Ok ive done some math with this as well and ill tell you what ive found out.
Youll notice on your HUD when attacking enemy ships there are these green bars around a sort of arrow looking shape, when the green is gone the armor is gone on that side. there is the front of the ship, a front quarter, rear quarter and rear of the ship. there seem to be 6 or 8 areas of a ship (also keep in mind that different ships have strong and weak points.)like i said there are either 6 or 8 sides of a ship. There may or may not be front and rear quarters but there seems to be. Just keep hitting the same area repeatedly.
To open a weak spot quickly on each ship type attack galleons on the front and sides, frigates at the rear and sides, and sloops in front or rear.
Ok now for what ive found out, I have lvl 5 thundershot on my cannons, if i hit a ship on the side with 0 points in barrage and no crew with the hulls damaged im doing 832 damage. now once i upgrade barrage to lvl 5 get a crew of 3 ppl and hit at the rear of the ship(25% damage bonus remember) and the hulls are weakened ill be doing 1625 in damage with my thunder shot, currently lvl 17 cannons so its gonna be a lil bit before i start upgrading fury, ill put 4 points in it when all is said and done. Oh with the 1 point i currently have in barrage and hitting the rear of the ship im hitting for nearly 1100 points.
BTW Im Mythic, I captain the Savage Demon(war sloop) I solo mostly and Im fast as hell. Bring it on ya Spanairds. Ill be playing on the first Ideal server available when I PvP so come and get some.