MSF - Orchis Omega 3 - Mystic node 2 one shot with Mephisto-Bifrost

Need Vahl and Meph ults to be ready at start.
The reason I didn't use Vahl's ult first but special instead, is because you need Vahl's ult to get your buffs back after Thanos' passive triggers. Unless you know you will kill him with the ult.