For the achievement to get Magma Beast Eddie:
Wrath: Reaper/2 x green
Gambler: Radiant/Warlord
Beast: Reaper/2x green
A.Bat: Reaper/2x green
Time: 1:30 min. - 2:30 min. (99% safe!)
For finishing the achievements to get the Legendary Cosmic Soul:
A.Hierophant: Reaper/2 x yellow
Gambler: Radiant/Warlord
Raven Witch: Eternity/Cosmic
A.Bat : Reaper/2 x green
Time: 1:05 (best time) min. - 2:30 min. (99% safe!)
PS: the event post is too confusing, so post your teams right here!