[PATCH] Make quinqueremes/heavy warships useful for siege

[causative]

Heavy warships with 5-10 catapults garrisoned are extremely expensive, so they ought to be worth it. Heavy warships deal 30 crush and 30 hack damage per catapult garrisoned. This isn't enough damage to use them to attack fortified positions on the shore. With five catapults garrisoned, it would take at least 2 minutes to destroy a fortress, and a heavy warship can't stand up to a garrisoned fortress for that long. It also isn't even enough damage to compete with garrisoned medium warships in ship-to-ship combat. For more details on the balance, see the first post of this thread: ​https://wildfiregames.com/forum/index.php?/topic/20835-balance-heavy-warships-too-weak/ (note that the thread digresses into a question of historical accuracy. Just the first post makes the case for game balance.)

My proposed solution in that thread is to increase the damage per shot of the heavy warship to 100 crush 10 pierce per shot, the same as the catapults they are carrying. elexis endorsed this plan and suggested I submit this patch.

There is an additional balance consideration, which is that although garrisoning a heavy warship with catapults is extremely expensive, an ungarrisoned heavy warship is cheap (200 wood 200 metal) compared to the cost of a catapult (350 wood 350 stone). However, I believe tests show it is not necessary to increase this cost. Garrisoned medium warships are greatly superior to heavy warships for ship to ship combat, and my tests show that ungarrisoned heavy warships are inefficient at attacking fortifications no matter how many you have, because they get in each other

Additional minor changes in this patch: I changed the splash damage to be the same as a catapult, just for consistency, not for any balance reason. (That's actually a slight nerf to damage). I increased the MaxArrowCount from 10 to 11 to be consistent with the tooltip which says you can increase the arrow count by garrisoning up to 10 catapults (with MaxArrowCount = 10, you could only increase the count by garrisoning up to 9 catapults).

The Ptolemy Juggernaut depends on the Quinquereme template, so I also increased the cost of a Juggernaut, to 400 wood 300 metal 350 stone. This is just so that it still costs more than a normal heavy warship.

I have tested this change for balance. Here are my findings. First, ship-to-ship combat:

1. An empty heavy warship is now approximately equal to an empty Briton medium warship. It depends on the range - heavy warships are better at close range because their shots have a higher spread and therefore often miss at larger ranges. In one test, the heavy warship won with 281/2000 HP remaining.
2. A heavy warship with 5 catapults garrisoned is somewhat better than a Briton medium warship with 10 garrison. In one test, the heavy warship won with 573/2000 HP remaining. Note that the heavy warship is vastly more expensive: total cost of the medium warship + 10 garrison is 650 wood, 500 food, 150 metal, 13 population, assuming the garrison costs 50 food 50 wood each. Total cost of the heavy warship + 5 garrison is 2100 stone, 2100 wood, 200 metal, 18 population.

So, heavy warships with this change are slightly stronger than medium warships, but far too expensive for ship-to-ship combat. That's OK, I think, if the intended purpose of heavy warships is siege.

Second, testing for siege:

1. I created some shore defenses with 2 garrisoned defense towers, 1 fully garrisoned fortress, and a few citizen soldier archers and slingers milling around on the shore. One heavy warship with 10 catapults garrisoned and all 3 armor upgrades was unable to destroy these defenses - it had to go back for repairs after killing one tower. It is not possible to focus down the fortress, because the heavy warship randomly targets the towers and the citizen soldiers as well.
2. Two heavy warships with 5 catapults each and all 3 armor upgrades were able to destroy the shore defense, with one at 75% health IIRC and the other around 50% health. The total cost of these warships and garrison was 4200 stone, 4200 wood, 400 metal, 36 population.

So, heavy warships with this change are able to take out shore defenses, at large expense. It may be advisable to send in some medium warships with them to help tank the damage and kill shore units.

The cost might seem prohibitive. However, it is balanced and useful in certain games. If the game has reached a state where you have way more resources than you need, but the opponent has heavily fortified his shoreline and you aren't making progress, 8800 resources would be a reasonable price to break the stalemate.