I have no luck with Rakdos, and yet I feel compelled to try again. Once again, here’s a decklist before I disassemble the deck.
After some tuning I was able to get it to function, but the deck’s timing is very awkward. The objective is to get Kazarov on the board as soon as possible (never as soon as you want), and then use mass-ping spells to quickly add many +1/+1 counters. Kazarov costs a lot, but the spells are cheap. Keeping them in your hand long enough for them to be useful is hard, and all those turns give your opponents plenty of time to draw removal.
I originally ran Whispersilk Cloak to get attacks through more easily, but it’s really hard to keep Kazarov on the board unprotected for a turn. Swiftfoot Boots let you wait only one extra turn for Kazarov and still protect him. Now I know why Lightning Greaves costs more.
My next set of changes to this deck would be to increase my defensive base, probably with more creatures overall, more defenders, and fewer pingers. The pingers are too easy to kill with my own burn spells, not fast enough to provide adequate defense, and not necessary to add tokens to Kazarov late game