Where should I go with the T67 on city maps?

I'd either find a heavy or two to follow and support (and hide behind if need be) or go to areas where the mobility and gun come into more use, i.e the field on Ensk, or the hill or maybe even tracks on Himmelsdorf. On Ruinberg i would go to the small town in the east and the surrounding areas and again try to use the mobility, camo and view range to my advantage. No idea regarding Pilsen, i haven't played that.

In general though, avoid corridors at all costs due to the lack or armour. You always have to play to your strengths. Look at the map on the loading screen, think about your tanks strengths, then use a process of elimination to see which strengths would be best with the map. For example, the T67 has mobility, camo, and firepower. On Ensk, the camo and mobility comes to use in the field. On Himmelsdorf, you have to focus on mobility and firepower instead etc.

Good answer and I agree with all. I would stress the role of ‘helping out’ the heavies. Follow with some, scout around their flanks if possible. Use them for cover in corridors and Stay Alive so you can be effective in the later stages of the match

Not fond of that map. It seems very unbalanced to me with one team starting on that hilly area.

If a heavy like t29 can make it to A1 that has a sweet bowl to play in to keep hilltops at bay.
I often take my lights there and can use treebush but i never have the support and get rushed.