During the last days I was thinking about hips. The longer I thought about hip flexibility the more I didn't understand the word opening the hips (perhaps it's a language misunderstanding). Flexibility of the movement of the legs is the goal, in all directions: forwards, sidewards, backwards.
Baddha konasana A is even a bit more demanding. It is also an exercise to increase the flexibility of the hips.
My main challenges are urdhva dhanurasana, laghu vajrasana, kapotasana. It is important to lenghten the front of the body when arching back. Back bending means lengthening front of the body and opening the chest.
I see the importance to be able to move the legs freely.
My attention is often at the hips when I practice. I know that I want to bend from here. I don't want to arch the back when I bend forward i.e..
Additional asanas I do is side split and forward split (hanumanasana). I use blocks and blankets as a support. Gravity helps me.
To protect the body it is important to engage bandhas and leg muscles. I have mentioned this already, but it doesn't matter to repeat this.