Nothing crazy about acting like a real kaleun. I agree that shadowing is hard at higher TC but as long as you are careful it can be done although I prefer not to go higher than 32x as you can see whether the escorts are onto you or not.
I do overtake at up to 128x though quite successfully as long as you are outside their sensor range which gets harder the later on into the war you go.
I normally don't do it for a full 24 hours either just until it is dark enough to make an attack.
