Here is my standing series. I hold each pose for 10 long breaths (about 45 seconds). After Warrior 2, it can be a struggle to keep your leg bent so a quick straighten and then re-bending works. My general flow is stretch, 5 Sun A and Sun B Salutations, then the standing series and then a mat series for my hips followed by Savasana.
A block is most likely necessary for the balancing series at the end.
I first do this group on each side;
Warrior 1
Warrior 2
Humble Warrior or Reverse Warrior
Side Angle (5 breaths)
Extended Side Angle (5 breaths)
Bound Side Angle (5 Breaths)
Warrior 2
Triangle
Warrior 2
Then I do this on each side;
Pyramid
Then I do this on each side;
Crescent Lunge
Crescent Lunge Twist
Finally I do this on each side (balancing series) ;
Warrior 1 (to step into Warrior 3)
Warrior 3
Standing Split
Half Moon.
This series has some challenges (especially in the balancing series) and when done without a break is a good exercise flow. Remember to keep your focus on breathing and to count your breaths.
Namaste.