Sufism

Sufis are sunni. Sufism or Tasawuf is a process of leaving the dunya for Allah alone.

Anyone who does the above is basically treading a Sufi path.

Traditionally, some Shayook mastered the process and taught it to students known a murideen.

Amongst the sufis have been great warriors, pious shayook and deviants, just as you will find in any type of group.