Just on the bit about what you need to do to prepare for the directions hearing, the onus is currently on the aggrieved to provide the further and better particulars (and you don't have to do anything at this stage). If they submit those particular to the court, they won't usually be in the form of an affidavit - ours weren't, we just filed some supporting evidence like text messages to support the allegations, along with a recording from of the events that we complained about, and the court forwarded all of that on to the other party.
Even if the other party does provide further and better particulars, you don't need to respond to them before the directions hearing, or at all.
Only a trial requires evidence to be submitted (ie affidavits) by the parties. That's the evidence the court will be testing at trial.
So, in short, the time for response from you about the application is before trial - if you decide to contest, you'll be given directions of when the aggrieved has to file evidence they're relying on to support their application (ie an affidavit), when the respondent has to file a response to that evidence (ie also an affidavit), and when the trial date will take place at court.
For us, our matter was set down for trial about nine weeks after the last mention. Our trial affidavits were filed about four weeks before trial. The respondent's affidavit was filed about a week before trial.