Hi Nikhil,
I think the handbook is an excellent *introduction* to all three (credit, ops, basel II)
but in regard to Credit & Ops: for the “new” L2 (since that material generally pre-dates L2), I think you almost *must* refer to the sources (many are simply not in the handbook)...it is not good strategy for credit and ops to use only the handbook
re: Basel: I think Jorion’s Basel introduction (in the FRM handbook) is maybe the best you’ll find anywhere. So, basel has more standalone utility. However, since it’s not been updated (really), you still want to refer to the additional papers in the study guide (e.g, concentration, IRC, market risk revisions) and, definitely do not skip the 19-page Explanatory Note on Basel IRB (good bang for buck)...
...so for Basel, I think it’s fine to use handbook PLUS the 6 or 7 additional Basel-related assignments (b/c much of that is definitely not in the handbook)
David