L2 Ethics - How to deal with material outside the Ethics Handbook


I passed L1 Ethics by studying completely from the Handbook. In L2 the CFAI textbooks have some additional chapters on Soft Dollar, Prudence and some Case Studies. I know that Soft Dollar is a must know, since it is major material for L2. How should i deal with the other subjects, since I am in tight deadlines.

Will Handbook and Soft dollar be enough? I accept that more is better but just want to know practically how L2 works.