@Baron:
The real difference is between OOB ground units and naval units decreasing with higher cost compared to ground units strength decrease with higher cost compared to naval units strength increase with higher cost, if totally following Enigma formula with D8.
OOB: Inf 5.33, > MI 3.00, Art 3.00, MI+Art 3.00, > Tank 2.00
DD C8 0.75, > Cruiser C12 0.50, < BB C20 0.628
D8 system:
Inf 4.00, > MI D2 2.25 , Art D2 2.25, MI+Art D2 2.25, > Tank 2.00
DD C8 A2 D2 0.563, < Cruiser C12 A5 D5 0.625, < BB C20 A6 D6 0.707.
With DD A2 D3, defense is rising to 0.844 and this make DD above > Cruiser (0.625) and BB (0.707).
This is the same as OOB strength distribution: DD 0.75,> Cruiser 0.50 & BB 0.628.
Again, Cruiser on defense is still unoptimized but it is not different than OOB.
So, this can be a reason to change that way to not affect too much balance.
Compared to D10, D8 sided dice brings a more interesting scale of strength for warships.
Simply because 6/8 get 75% for BB, which is the highest acceptable combat values vs 4/6 (67%) or 7/10 (70%)
And Destroyer can be lowest but acceptable: 2/8 get 25% compared to 2/6 (33%) or 3/10 (30%)
Cruiser can reach the most interesting middle range: 5/8 (62.5%) compared to 3/6 (50%) or 6/10 (60%).
DD C8 A2 D2 0.563, < Cruiser C12 A5 D5 0.625, < BB C20 A6 D6 0.707
DD C8 A2 D3 avg A/D 0.704, > Cruiser C12 A5 D5 0.625, < BB C20 A6 D6 0.707
And this different scale makes DD much stronger than Cruiser on defense, but Destroyer on average it is the same as BB.
@Baron:
Scale on D10:
| **Unit
type ** | | **D10 com.
values ** | **OOB odds
offense ** | **OOB odds
defense ** | OOB values |
| Infantry | A2-3 D3 | 17-33% | 33% | | A1-2 D2 |
| Mechanized
Infantry | A2-3 D3 | 17-33% | 33% | | A1-2 D2 |
| Artillery | A3 D3 | 33% | 33% | | A2 D2 |
| Anti-Aircraft
Artillery | A0 D1 | 0% | 17% | | A0 D1 |
| Tank | A5 D5 | 50% | 50% | | A3 D3 |
| Fighter | A5 D7 | 50% | 67% | | A3 D4 |
| Tactical
Bomber | A6-7 D5 | 50-67% | 50% | | A3-4 D3 |
| Strategic
Bomber | A6 D2 | 67% | 17% | | A4 D1 |
| Submarine | A3 D2 | 33% | 17% | | A2 D1 |
| Destroyer | A3 D3 | 33% | 33% | | A2 D2 |
| Cruiser | A6 D6 | 50% | 50% | | A3 D3 |
| Carrier | A0 D3 | 0% | 33% | | A0 D2 |
| Battleship | A7 D7 | 67% | 67% | | A4 D4 |
Destroyer strength: .30144/8^2 = 0.675
Cruiser strength: .60144/12^2= 0.600
Battleship strength: .701442.618/20^2 = 0.660
Even such cost structure would not solve the warships DD vs Cruiser vs BB issue.
D8 allows it, because it goes from DD@2 25%, CA@5 62.5%, BB@6 75%:
Destroyer A2 D2 (0.563 / 0.563)
Destroyer A3 D3 (0.844 / 0.844)
Cruiser A5 D5 (0.625 / 0.625)
Battleship A6 D6 (0.707 / 0.707)
So, buying cheap you get weaker unit but costlier it becomes stronger, as it is suppose to be.
Is it what you will use?
I would probably ponder about AAA, StB and Sub defense values.
Maybe the weak odds are more realistic @1 out of 10 instead of rising them to 20%.
I might go this way:
AAA A0 D1 vs up to 3 planes but lower cost to 3 IPCs each.
OOB you get near 50% when 3 planes targeted for 5 IPCs: 10% per IPC.
Here you keep same ratio: 30% for 3 IPCs: 10% per IPC.
StB A7 D1
Bombers were made for offense and already very good at it.
Sub A3 D2
Because Subs on defense are usually trapped by planes and 1 DD.
The game mechanic make Subs too much vulnerable. Defense @2 is a small compensation.
I would prefer TcB A6-7 D5, that way combined arms simply gives +1A to Inf, MI and TcB.
Fg A5 D7 vs TcB A6 D5 seems a nice way to make both planes different.