Question

I need to improve my tarqueeq and tafkheem technique, are there any specific
Surahs or Surah which would be excellent to practice with?

Answer

There are many part of surahs that can be recited to practice tafkheem and tarqeeq.  The main thing to remember when choosing a surah or part of one, is to find a portion that has tafkheem and tarqeeq one after the other.  Needless to say, we need to keep our intention pure that we are reciting for Allah’s pleasure, even if we are practicing a certain technique. 

Some parts that are particularly concentrated with alternating tafkheem and tarqeeq are:

Saba’ aayah 10-14, Saad aayah 21-24, Saad 41-47, Ghaafir 64-67, Az-Zukhruf 16-20, Qaaf 21-29. 

There are many more, these are just a few sections to start out with.