Rakdos Aggro

I love a good ol rakdos deck.

I see a few areas where you might be able to squeeze out a little more efficiency/potency here. Your curve is super low (as it should be), so you don't need to run 21 lands. You can get away with 19 (the typical build) or 20 (the conservative build), so I'd advise trimming it down at least one land. Your landbase also has a little wiggle room for improvement. Dragonskull Summit is a worse version of [[Blackcleave Cliffs], as it's conditional, can't be dropped untapped turn 1, and you don't need to worry about lands if Cliffs comes in later tapped anyway, so that's an easy potential sub. Mount Doom is an ok idea to get damage out of a land if you topdeck it, but you'd be better off with a [[Sunbaked Canyon]] to toss for material, as you need 4 lands to run Doom for 1 damage a turn, which is hyper-inefficient, you won't be using its nuke ability, and it pings you for mana use. Generally better to use Canyon, which you can toss for 1 colorless to draw if you topdeck it. Blazemire Virge is problematic for a turn 1 play, as you'll almost certainly want to play either a red or black 1-drop (and Virge needs another land to access red), so you'd almost certainly be better running 2 more fetchlands ( Wooded Foothills and/or Polluted Delta) so you can guarantee your turn 1 drop (which also helps with color fixing). I'd also consider running another basic mountain over one of the Pathways, as you'd like to save some life through fetching if you can, and fetch into a shock land is a bolt to the face which you can avoid if necessary (gives you more time on the clock for Cecil and Confidant but still lets you do the shock combo to flip Cecil if you want).

I'd consider putting in a Hearth Elemental // Stoke Genius in place of one of the lands, as it's just about the best topdeck you can ask for in a deck like this. You'll be able to cast it for 1 and/or draw 2 cards off of it for 2, so you're at +2 with a 4/5 for 3 mana off a topdeck that also triggers Swiftspear. The only downside to running it is Confidant, but with only a single copy, the chances of it smacking you in the face are pretty low, and the benefits almost certainly outweigh the one game in fifty that you'll get nuked by your own boy. And even if you do, you'll flip Cecil so it's not a complete nonbo, more of a conbo (trademark).

Just some thoughts, not trying to throw shade at the build.