Is Practise manual sufficient for dt and idt.

s, it is sufficient because all topics r well covered

Not.

The law is tremendously more fast.PM can only give you an idea about type of questions. PM will be good enough for few chapters but very inadequet for others. It will prove to be a coin toss. Institute Study material is vast but that is your benchmark.

You got to know law and various applications of it and PM is inadequate.

No doubt Institute PM, RTP, Mock test paper compulsorily have to cover for all eight sub. 

But other than that u have to follow reference book also, because PM, RTP are like question answer patteren u know very well, it is not sufficient to clear ur conceptual clarity. What happen is u have to mug up the questions as well as answers. That is quite impossible.

And now a days u found institute ask conceptual question instead of direct question, on that time u will be fly on sky.

As per my suggestion for DT go for vinod Gupta modules and summary.

And for IDT go for Bangar.

I personally benifitted, so I recommend u.

FOR DT   SIDDHARTH SURANA SIR HANDWRITTEN CLASS NOTES IN 480 PAGES( INCLUDING PRACTICAL QUES.) , BEST NOTES .  

if your luck is in favor, PM may prove to be sufficient, but it strongly recomended to get the understanding of subject at CA Final Level.

Go through some Good text books say IDT & DT: Bangar Sir's Summary.
& also check Revision Notes

Download above notes by appling Special Coupon code DT30