I would tackle the issue convincingly in court as follows:
1.Analyse every Parliamentary vote in the last 5 years, and as is common knowledge, establish that the ANC MP's have used their majority EVERY time to favour the ANC, and screw the South African voter (except for the recent Monoco, where the ANC still managed a slim majority).
2.Argue for a declaration that the NA is, as is common knowledge, therefore 100% dysfunctional.
3.In this case, let the court analyse the available evidence on Zuma and accordingly impeach him. The fact that scandals such as the R3 billion fuel theft, the R5.3 billion Transnet kickbacks etc etc have not generated a single email from the President to the relevant minister would be a major proof of his delinquency and complicity.