Short Mincha…What should I do

If the Baal Tefillah says a "kortze Shemona Esreh ( Hocho Kedusha) should we start davening with the BT?
Or is it a choice?


You can and should start with the BT
Since it’s the BT Shemona Esrei for himself, he doesn’t anyone to say Amen

And if one is ther BT , he should say the regular Atah Kodesh