I'm currently working on a version of this line myself, I went the hard way and dug around my books for several hours this morning. Only have a few RN, but I'll hopefully have more soon
The basis of my line is slow crawling smoke gunboats with good AA and ASW, hydro and heals (if that doesn't make them OP). However, the whole line is SLOW, and doesn't have speed boost. Also possibly could have a player-aimed ASW mortar starting with the Rivieros (something similar to what we had on the Valkyrie in one of those wierd haloween modes)
Currently planning:
T2: IDk
T3: IDK
T4:IDK
T5: Mendoza (Argentina) similar to the Acasta
T6: Javary (Brazil) a jurua appropriated to the basis of my line
T7: Greenhalgh (Brazil) Essentially a mahan clone like the line above
T8: Almirante Rivieros (Chile) this ship would have 102mm guns (smallest in tier) but would have 1.8-2 second reload, also could have 1/4 HE pen if not for the whole line then at least for this ship
T9: Coronel Bolognesi (Peru) Formerly the dutch Overijssel (i think thats how you spell it), sold to Peru in 1982. Could have a few more AA guns as part of a "modernization" when they were sold or something
T10: Aragua (Venezuela) One of the Nueva Esparta class destroyers built in Britain that were similar to the Daring class. Exchange a rack of torps for more AA guns, better ASW, and a slight reload buff? Her 2 sisters were mmodernized, but she wasnt, leaving one of them for the supership
T11 (?) Nueva Esparta (Venezuela): Up-tiered Aragua with higher AA DPS, gun reload, torp damage, gun damage, and health, and some funny button gimmick.