D.D. Survivor x 3 is a MUST in any Macro Cosmos deck.
There are several ways. But the most easiest way is to run Monarch deck with Macro. DDS are a free tribute (i.e. even if you tribute DDS, it comes back on your field at the end phase) So bomb away with Zaborg, Mobius, Thestalos. (Especially Zaborg helps when you got a Cyber Dragon or something higher that gets in DDS way.)