From http://www.wowwiki.com/The_Sha%27tar:

Mechanar
Trash: 12
Mini-Boss: 90
Bosses: 120
Full Clear: 1620 rep
Full Clear (heroic): ~2100 rep

Botanica
Trash: 12
Bosses: 120
Full Clear ~2000 rep
Full Clear (heroic): ~3100 rep

Arcatraz
Trash: 12-24
Bosses: 120
Full Clear ~1800 rep
Full Clear (heroic): ~2600 rep

(these are non-Human values, btw)