I would start with an IJN CV for some creds unless you plan on selling Elites.

Well all the nations take pretty much the same time, the thing some make the diffrence is how good you are in the ship you play in. If you know how to move to get the best range and how to hit the opponent on the way so you deal the most damage.

But that line some take the longest time to level to a 6 is the cv line for the low experience gain.

Also I dont believe the GMs while move your data to the other server as they still want Kaiser alive.

UK bb is shortest as you have the extra crew slot. It means you don't need to rotate any crew once at bb5.

BB is the shortest simply because CV xp is horrible.

Considering no matter whan you need to lvl from 1 to 120

The BBs are shortest, but they all take about the same amount of time.

Neither is long or tough anymore...

USD is all :D

Zx.