https://www.sukerchakia.com/history-of-misl/
Stumbled over this brief description of Sikh cavalry tactics.
Just remember that these tribal tactics were used well before the Khalsa Raj was taken over under Ranjit Singh. Moreover, tactics really changed after the end of the Napoleonic wars, as more foreign mercs were hired to upgrade the Sikh military. The Sikh Wars didn't take place until the mid-1840s, so there was indeed a lot of changes. It is also reasonable to expect that some of these changes to tactics permeated the Irregulars, as they looked to emulate the regulars in some respects.
All that said, my knowledge of Sikh Irregular cavalry was that they preferred to attack but during the Sikh Wars often these attacks were beat back by much smaller British forces.
It must also be remembered that after Ranjit Singh's death in 1839 the Sikh Confederacy lost the glue that had bound it together. The downfall of the Khalsa forces demonstrated this by adopting defensive tactics throughout most of their subsequent conflicts with the British/HEIC. If the Khalsa forces had been more disciplined and better used, they had a chance of repelling the British/HEIC invasion of the Punjab (which the British/HEIC had planned in advance). Yet, the Sikh leadership was conflicted, with many seeing the unruly Khalsa forces as a direct threat to them (their lives), so having them go off and fight a war against the British/HEIC was a means to an end, regardless of the outcome.
Some good resources on the Sikh military forces are as follows:
Bajwa, Fauja Singh (1964) Military System of the Sikhs During the Period of 1799-1849. Motilal Banarsidass, Delhi, India.
Kumar, Raj (editor)(2004) Military System of the Sikhs. Ajay Verma (for Commonwealth Publishers): New Delhi, India.
Lafont, Jean Marie (2001) Maharaja Ranjit Singh: The French Connection. Guru Nanak Dev University, Amritsar, India.
Mansingh, Gurbir (2006) French Military Influence in India. United Service Institution of India, Knowledge World, New Delhi, India.
You can find these sources if you look, as India offers a lot of reprints for sales. There is also the NAM and British Library.
Hope this helps.