Sending documentsof opposite party to forensic examination.

1st case, I filed a case of declaration against my tenant who claimed to be owner on the basis of fake papers.

2nd case, Therein, tenant also filed same case of declaration against me.

In 1st case, firstly my witness & cross happen, then tenant's evidance and cross happen. Then, after his witness, I filed an application for sending documents of tenant for forensic examination.  That application was dismissed stating late stage of filing. Now the case is on final arguments.

In, 2nd case, nothing happen and every order says, "put up with connecting matter."

My query :-

1. On which stage is 2nd case ?
2. Can I file application for sending tenant's documents for forensic examination in 2nd case?
3. Is this a good idea ?