11 units trollface.jpg
Or alternatively, whatever works best for you. Different strokes for different folks. Pros and cons depending on what your situation is.
People will argue with me, but I think 10-12 units is the range, many people who try to take a 13+ load at once find it detrimentally impacting, even bright kids who tend to be the types to do it and do with crazy subjects. (Talking about doing them all at once too, no acceleration) And then it's a bit of shame if they do pull it off and 3+ units don't count.
Shadowdude is one of the few people that have pulled 14 unit load off all the way through Year 12. Hats off to him, especially with the combo he did!