Seems Manticore is swamped in new DD's/CL's at the moment according to HoS.
Maybe, maybe not.
HoS cuts off before BoMa and (more importantly) OB.
We have no idea how many ships were destroyed during OB, other than it represents a significant loss of combat power according to White Haven.
Given the fact the RMN had manpower shortages after BoMa (for some dumb reason), its possible they acutally mothballed smaller units to come up with the neccessary crews (especially experienced officers).
Those ships would likley be destroyed during OB
Also HoS doesnt cover losses of older ships during the Havenite Wars at all. Some building numbers might look impressive, but i wouldnt bet on many Apollos and Valiants surviving until 1922.
Then there is Silesia. According to HoS many Avalons (and nearly all Kamerlings) were given to Sarnows command for some reason. Personally i dont understand why he needs so many ships, little more than one ships for each system is more than enough to police half of Silesia, but whatever.
All in all i wouldn't be suprised if the RMN has less than 100 CLs (pretty much only Avalons) available for offensive operations against the SLN.
And probably a similar number of Rolands/Culverins/Wolfhounds.
Also, the numbers given in HoS are dubious at best, especially for wallers. They dont work at all with the numbers and clues provided in the actual series (especially AAC).