1) Evidence by way of affidavit, is known as Petition of evidence, even if the other party, defendant does not appear, the court will have to record your evidence in the case and then proceed to hear arguments and thereafter grant the relief you are seeking.
2) It would not be wise to appear in person before the court if you have engaged the services of an advocate, take a NOC from your advocate and then appear in person and seek for the ex-parte decree, but in any case the court will first have to follow the above stated procedure as per law.
3) You're best option is to follow the procedure laid out before you, do not look for short cuts, this will give the other side an opportunity to prefer an appeal on those grounds.