The first answer is self-evident after moving on to the practice chart. I can do the F to B flat slurs at about 180 to 200. I have improved quite a bit, so forget it. I will work on the on the chromatics until I improve and keep it up in warming up.
The second question is more interesting.
How important is the technique of triple tonguing chromatics to developing a more relaxed way of playing and developing range and endurance?