Look, don't overthink this. 70min is sufficient. Minimum connection time is 60min; that is all that matters. Unless your incoming flight is late, you will make that connection; no doubt about it.

If the incoming a/c is not assigned a gate but you are bussed to the terminal, you will be dropped off right below the main transfer security checks; couldn't be easier and will in fact save you from a lot of walking. There is a dedicated lane for C/J pax and Star Alliance Gold to the left at transfer security checks; hardly never any waiting time.

My guess is that you will even have time for a short visit to the TK Business class lounge.