Me mentioning the Tacoma class was only to put crap on it since it’s far worse then the Town class 1940 ever will be for at least the gun can fire to the fore and do damage, I take every opportunity to put down on it’s uselessness bar being a flak lighter.
The devs terminology of Coastal & Bluewater are useless terms since many vessels within the coastal TT are in fact ocean going warships designed for combat in the middle of an ocean and logically should be in the Bluewater TT many of which would be Rank I, II & III vessels realistically if the devs naming convention was followed.
But enough of those I still think the Type 1937 could work at Rank I around 3.0 for germany, But we could also see Kaiserliche Marine torpedo boats added like the V-25, V-125 & G-101 TB classes added around 3.0 as well.
Edit, Going into specifications of ships mentioned as asked note information is from Wikipedia & Jane’s WWI, I don’t really have more knowledge outside of those two dodgy sources (RIP my plans for ever suggesting any ships here).
• Type 1937: 1×1 10.5 cm cannon, 1×1 3.7 cm flak cannon, 2×1 2 cm flak cannons, 2×3 21" torpedo tubes, and seamines. 1139t deep load (technically all tonnage stats in game are deep load), maximum speed of 35kts.
• V-25: 3×1 8.8 cm cannons (later in life had 3× 10.5 cm cannons added), 6× 50 cm tubes + 8× torpedoes, a few mines, late in V-25’s life had one cannon landed for a floatplane, speed of 34.5kts, mass was 975t.
• V-125, an improved V-25 with 4×1 10.5 cm cannons & 6× 50 cm tubes, had a similar tonnage & speed.
• G-101 class, 4×1 8.8 cm cannons, 6× 50 cm tubes, mass 1734t, speed 33kts
I also think that the US torpedo boats from the turn of the century could work as well See the Blakely class could work at 3.0 or lower in BR, Similar in your comments you keep replying to yourself with you mentioned the Town class HMS Montgomery G95 and it’s my opinion that yes the US should get a Wickes class destroyer as currently G95 is technically the only wickes class in game LOL RIP America hah hah, Also for America the Smith class destroyer at 3.0, ntm many WWI designs.
Added bonus the Sampson class with one in it’s WWII refit maybe as a premium.
• Blakely class, turn of the century vessels so it’s small, 3×1 1 pounders, 3×1 18" tubes, mass 196t, speed of 26kts, IIRC some had aircraft tested.
• Wickes class 4×1 4", 1×1 3", 4×3 21" tubes, mass 1247t, speed 35kts
• Smith class, 5×1 3" cannon, 3×1 18" tubes, mass 916t, speed 28kts
• Sampson class, 4×1 4", 2×1 1 pounders, 4×3 18" tubes, mass 1225t, speed 29.5kts
Late life refit for USS Allen, 1 pounders were landed for a 3" cannon & during the second world war saw two sets of tubes landed for six 20 mm Oerlikons and more depth charge projectors.
Russia could also get further Norvik class ships since we’ve a Derzky class & Fidonisy class already so a Orfey class & Izyaslav class, Premium option Orfey class destroyer Engels fitted with a 305 mm recoilless rifle.
• Orfey class 4×1 4", 1× 2pdr, 2× MG’s, 3×3 18" tubes, mass 1440t speed 32kts
Engels, aft 4" removed and replaced with a 12" recoilless rifle.
• Izyaslav class, 5×1 4", 3×3 18" tubes, mines, mass 1350t, speed 33kts
I’m not versed in their TB’s or TBD’s but they could also get a torpedo cruiser since I think they had one (Don’t fear not a Kuma class like conversion).
Now Britain heh they have got some choices that could work and IMO the HMS Swift would work and could be a 3.3 tbh but the fastest destroyer of WWI and it had a 6" cannon (this could be the premium option), There’s to many options but I’ll list some that could work.
The Faulkner class could be a mean 3.3 with six 4" cannons in an as built version and the L class as an option as well ntm a Havock class TBD or Viper class TBD (ordered after the demonstration of the first stream turbine ship Turbina).
Event option S class destroyer HMS Stronghold or HMS Thanet with provisions for one RAE Larynx (think a very early cruise missile type but more of a catapult launched pilotless monoplane with a 300kg charge).
• HMS Swift a single ship since it was a test bed, as built 4×1 4" (1917: 1×1 6", 2×1 4"), 1×1 2pdr, 2×1 18" tubes, mass 1825t, speed 36kts on trial, 35kts in wartime.
• Faulkner class, 6×1 4" cannons non centreline mounts, 2× on the bow, 2× just behind the bridge (kinda think the Omaha class fore weaponry layout) then 2× more on the stern, 2×2 21" tubes, post war refits 2×1 4.7" cannons, 2×1 4" , 2×1 2pdrs, 2×2 21" tubes, Mass 1700t, speed 32kts.
• Havock class, 1×1 12pdr, 3×1 6pdr, 3×1 tubes, mass 279t, 26.7kts.
• Viper class, 1×1 12pdr, 3×1 6pdr, 2×1 tubes, mass 350t, 36.5kt
• L class, 3×1 4", 2×1 2pdr, 2×2 21" tubes, mass 1026t, 29kts
• S class Generally as built 3×1 4", 1×1 2pdr, 1× MG, 2×2 21" tubes, 2×1 18" tubes and depth charges, mass 1220t speed 32.5kts at deep load 36kts when not (I kinda wish on some speed speed increased as you got lighter).
Post WWI trails fore 4" removed on Stronghold & Thanet and replaced with one cordite catapult for an RAE Larynx.
WWII service Both ships had the catapult removed and 4" guns added back, prior to WWII they were converted to minelayers having some torpedoes & the aft gun removed, iirc they also had more LAA added.
I would continue with Japan, Italy & France But I’ll come back to that as for I must be off unfortunately (rather late here).
I will do the next three nations soon for suggestive ideas but I must be off again.