ETR Madara isn't going to do you well until he's skillbroken.

Can try: Kakashi [Summer], Madara [Great Ninja War] / Kurenai [Summer] / Hashirama Senju [New Year], and Kakuzu [Akatsuki's Creation].

Forced Madara lineup: Madara Uchiha [Edo Tensei Release], Itachi Uchiha [Edo Tensei], Nagato [Edo Tensei]. You can replace Itachi or Nagato with Sasori [Edo Tensei].

For infinite illusion:

Trial 1 and 2: Temari [Great Ninja War], Genma, Naruto [Asian Style]

Trial 3: Choji [Great Ninja War], Hashirama Senju [New Year], Naruto [Asian Style]

Any main, try to use a summon / chase that leads into Madara's chase or the important chases (ones that cause control / debuffs). Use the in game chase function guide under talents to help.

As for main skills, play around and see what works for you. Generally healing and scaling is preferred in most cases.