I recently finished a mohair scarf in a chevron pattern and it came out nicely - you can clearly see the design. Sorry I do not have a picture - I write everything in my journal but never took pics. Will need to have my husband bring the digital camera home from work.
I found that eventhough the mohair seemed 'fine', I needed to use larger needles - size 10 needles. Used 2 skeins - (about 270 yards) for the scarf.
Try making a swatch first and go from there.