Best way to attck midcap ?

First tread in here.. :-)

My clan usually have a lot of trouble at the initial fight at midcap.
And if you loose midcap, then you are in a big disadvantage..

Anyone have any good ideas how to attack midcap as efficient as possible ?

Hey, welcome!

Are you talking CP_Well, or CP_Granary?

If it's Granary, get your medics to buff soldiers and demomen during the intial spawn; those classes can then weapon jump to the centre. Demomen can arrive only moments after the scout rush, as some of Helter's videos demonstrate.

Medics are invaluable in that initial fight and must be protected from flanking enemies at all costs.

A soldier or demo on top of the far left-hand crate (as you run into the centre, it's the crate furthest from you, on the left-hand side) can spam down into the choke point there and slow up the enemy considerably. In fact, in general, soldiers are awesome here.

These are all general pub tactics; in a clan, you might have something more advanced - hopefully the people here who play a lot of clan matches will have more feedback on that...

If you get a soldier to jump up on the crates, while a heavy + medic runs round the left, you can completely catch them by suprise.

Yeah, definitely have someone on the crates. But I also say don't go for the cap at first but have the majority of the team, especially scouts, flank left or right and hit them from the side or behind.

Granary is very different to say badlands. In that map you need to get the to mid point as quick as possible, and control it. In granary, there is so much cover, and there are only two ways from there to your second point.