Qiraat

Reciting a surah or aayaat equivalent to a surah in Salaah

Q: I believe that in a book I read titled, Laws of salah, written by Muhammad Ilyas Attar Qadari Razavi (Dawat-e-Islami) it said on the hundred and fifth page these following words:-

'After you finish surah Fatihah, utter amin in a low volume and then recite either three short ayahs or one long ayah that is equivalent to three short ayahs or any surah such as surah Ikhlas.'

I had a query based on the last line of this paragraph. When it quotes, 'or any surah,' do you think that this is implying that after surah Fatihah has been recited you can recite another surah, or is it suggesting that after surah fatihah you can recite an ayah that is equivalent to another surah, or do you think that it can be referring to both?

Masnoon qiraat in witr

Q:

1. My question is what surahs are the best to be read in witr? (I am referring to a Hanafi Madhad) Which or what surah is the best to recite in the first rakah, second rakah and in the last rakah.

2. Also is it permissible to perform one rakah witr after praying isha? And also is it permissible to perform 1 rakah witr in the dawn?