Withdrawing from the thought processes does help with the 'dark night', although it is not always easy to do. I used to feel guilty about not thinking, perhaps due to previous programming from other spiritual traditions that value insight and wisdom above samhadi. But I am learning one thinks better and can see things clearer, when the mood is calmer, and the mind becomes still. So it is okay to give oneself permission to not have to think about anything at all. To not have to worry about knowing everything and understanding it all. It is okay to enjoy the silence and stillness without feeling any pressure or guilt for that. To just put it all down for a while. Nothing bad happens.
My practise at the moment is focusing solely on ways to disengage from the thought processes. When I notice myself thinking throughout the day, I note 'thinking', then become aware of the present moment, and without judging the contents of the mind, I try to practise single-pointed attention on whatever task I am doing in the moment. This can help bring some relief, albeit temporary, as before I know it the attention is back with the thought processes again.
At the moment I am studying cyber security which involves a lot of sitting. So have been exploring ways of practising light samhadi whilst in movement. Not sure if it is possible to get into deep states of samhadi in motion, but can sometimes get quite still with standing meditation.
Sitting meditation is essential though, as I notice afterwards that the ability to remain undistracted on a task greatly improves, even after just a short sit.
A lot of my problems seem to come from thinking too much, or paying too much attention to thoughts. So the practise of samhadi and quieting the inner chatter has become my main focus now.