Look at other heroes as well:
rollercoaster_ (Treant Protector) - Sange and Yasha and Mask of Madness;
moker (Tauren Chieftain) - Sange and Yasha and Qelling Blade.
About Tadeas - he probably first bought Diffusal Blade and Sange and Yasha (there is a chance what orb to be cast).
Then when he was owning with this skill build, he got enough money for Satanic and used it to make fun of his enemies.
The top is probably what he thought, but nice topic.