Destiny Draw Engine

The Destiny Draw Engine. Why do people run it?

My understanding of the Destiny Draw Engine is that people throw Stratos, two Malicious, some Diamond Dudes, and maybe Fear Monger/Plasma into a deck along with three Destiny Draws and Reinforcement of the Army. Many people use it to much success in the TCG, but it just seems just a little inconsistent to me.

People use it in Zombie Synchro, Monarchs (Perfect Circle is the most notable variant), and in Dark-based decks. It doesn't even have a place in some of the decks it's used in, but people use it anyways. They want the (somewhat situational) +2 that can come from Stratos into Malicious for Destiny Draw.

That's all it's used for, to get Malicious into the Graveyard for card advantage. However, Malicious can be a good card by itself, it doesn't need the Destiny Draw Engine to be used. People can abuse it with Armageddon Knight, Dark Grepher, and plain discard costs/effects. Not to mention Mystic Tomato.

People did use Dark Grepher to abuse it in the past (when it and Plaguespreader Zombie were at three). Dark Grepher may not be as effective with the current ban lists, but Armageddon Knight, discard costs/effects, and Mystic Tomato are still viable options.

Maybe people could just run Stratos, two Malicious, and another Hero or two if they wanted to abuse Malicious without Destiny Draw?