Revision tips :
1) Applications of psychology are skills. And skills are not memorised or revised but applied. So focus on paper 1.
2) diagnostic approach : Don’t revise everything. Just focus on those areas where you are relatively not so exact.
3) And don’t be obsessed with statistics. Revise important psychological principles of every topic of the syllabus.
4) Give up temptation to read totally new topics. You may know something but due to lack of revision you might lose a lot of things.