Welcome to the war!
Ok first up, sorry if this comes across as snarky, but this really goes in general for new players to this game, but this:
Really doesnt apply here. The "best" way to use your nation is to have fun. And I don't mean in a treehuggy sense, I mean things like list efficiency unless your trying to loose is a bit of well..not a thing in
DW.
DW doesn't have Deathstar units, and even the dreadnoughts, while they look imposing, are actually surprisingly easy to handle (with the exception of maybe the Enterprise. they generally suffer from Bismark Syndrome). Even the units themselves, very few are "bad" and a lot of it is down to what you like and enjoy using. Thats kind of the thing with the games use of exploding 6s. In theory if you're jammy enough you can crit and double 1 a dreadnought with some frigates.
Anyway sorry for that rant, there are probably many who don't agree with me but yeah xD
Onto Her Majesties Forces!
In general the golden rule to
DW is keep everything in maximum sized units, and have at least 2 units of each size class (within reason, you can often get away with 1 unit of mediums as they're the games line ships and take up a lot of points. Larges you can easily get away with 1 of in a small game). The second point leads on from that. Focus on your mission objective. While you COULD spend your entire fleet focusing on the other guys flagship, if your objective is to kill his frigates well.. going out of your way to sink his flagship is a bit silly now isn't it?
Within the KoB, lots of nice navel units. The battleship is a beast but is weak to boarding so be careful. Those Orion Destroyers are evil little blighters too. Gaurdian Generators are handy in a pinch too. The KoB are not a boarding faction, so I wouldn't even recommend trying. The torpedos are the Brits bread and butter. They may not seem that powerful at first glance with the other guy getting
CC against them, but remember once everythings in RB1 the other guys guns will be damages, the torpedos dont decrease
AD with
HP loss so stay at full strength all game. The other guy on the other hand is losing
CC and
AD with each hit his ships take.
The KoB air on the other hand IS a little lack luster. The only thing i'v heard not get some complaints are the Marlins for Submarine hunting (namely the Ika), and the Illustrious Sky Fortress. The rest of the air stuff seems to be like the Vanguard Subs, rather lackluster, but their such pretty models you use them anyway
BAre in mind though i'm a EotBS player, so a KoB player will probably be able to go a bit more into it than me! Hope this helps get you started at least!