6 points in my opinion but good question!
5 marks - 1 easy sentence
5 x 6 = 30 marks
So this where I find that 6 points should be how much to write. However, make sure to give a bit of explanation on each, do not just state.
for 30 marks, you want 5 PQE +intro and conclusion
for 20 marks, you want 4 PQE +intro and conclusion
for 15 marks, you want 3 PQE "
for 10 marks you want 2 PQE "
This is how much for an A standard, but i presume you need less if youre aiming for a lower grade