For siRNA transfection of Daudi cells there are pre-optimized electroporation kits (https://altogen.com/product/daudi-electroporation-kit-burkitts-lymphoma-cells/). The exact nuances will depend on the reagent you use and the device you have, but it would be advisable to test a range of options for electroporation, and that will give you a good way of finding optimal protocols for larger-scale research.