Hi!
If you have no other better choices to fill out your last few slot,
put at least 1 "dumping ground" course. Those with COP 26+.
In fact, i only have 1 poly course, offered by 4polys in mind last
year. However, do be realistic, do some extensive research first,
and infer from previous year's COP as well.
If your L1R4 is 13, and you're interested in Biomed Sci, you can
omit SP.
Save your slot to fight for NP,TP's Biomed Sci.
In the event that there is someone competing with you for the same
course and with the same L1R4 aggregate as well, the system will
admit the one who ranked the course higher.
Don't waste your slot.
And for the last few slot, like the 11th or 12th, put one course
that has COP of 26+
Just to be safe, however, do find out the course structure and
everything before putting them as "insurance". Because sometimes
shit really happens, and you wouldn't want your insurance to be
your nightmare for 3years.