I'd rather have a deck that's great at one thing than a deck that is OK at a bunch of things
You can get some pretty sweet, limited edition skins, though - for example, if you bought the 'Warhammer Bundle' during the October 2023 Warhammer 40k Secret Lair, you got two codes, each good for ten premium card sleeves showing the 40k-ified versions of classic cards: Merciless Executioner as "Ork Kommando" Aggravated Assault Krenko, Tin Street Kingpin as "Makari the Lucky Grot" Zurgo Helmsmasher as "Ghazghkull, Prophet of the Waaagh!" Blind Obedience Danitha Capashen, Paragon as "Neave Blacktalon" Najeela, the Blade-Blossom as "Archaeon the Everchosen" Scourge of the Throne as "Stardrake" Beware, though - this is often the priciest way to find new codes
You could try to get as many ways to gain life into your deck as possible, but there isnt exactly an excess of those in Rakdos
Belzenlok is not one of those commanders whose necessary for the deck to work, but when used at the right time can really accelerate your board
And it should be, as Final Fantasy fans favorite little black mage