If you are on the spiritual path, and if you practice meditation, all these Dashas will do only good things to you.
People think the Shani Dasha is very bad.
Shani Dasha pushes you towards the spiritual path.
If you are stuck in small things, it relieves you from there and puts you on the spiritual path.
If you are already in knowledge and wisdom, Shani Dasha doesn’t do anything wrong.
In life, there are ups and down. Some good thing happens. Something which you don’t like happens.
But every incident is an opportunity for you to grow stronger.
So, don’t worry about Rahu Dasha or Shani Dasha.