Dhasa is at … well , to start with it´s spread out along a series of ridges . The highest sections are around 1800 meters , just over the threshold for acclimatization response. Don´t expect any substantial acclimatization effects from a short stay. On the other hand there are some treks starting here which will give you a definitive edge , like going to and staying overnight at Triund (2800-ish).
Czyli triund koniecznie, bo przyda się na aklimatyzację przed Leh