Multinetworks and Multi-Domains

until today i worked only with standalone worpdress install and i will try now the following scenario:
- Wordpress Multisite
- Wordpress Multidomain
the background is, that a have more than 20 landingpages and I would like to manage them with only one Wordpress installation. I alreday activated multisite support in wordpress. my question is now:
- which plugins i need from you to work with multiples domains and one Wordpress installation? do I need both plugins: "Multi-Domains" and "Domain Mapping" ?

Kind regards,