For the artifact list, did you consider Isochron Scepter and/or Sensei's Divining Top? Note that Top can draw a card AND be sacrificed to blast in response.
Nevertheless, my list is not artifact-based; I have tried several, but none has resulted more profitful than actual bauble burn! In my testing this outperforms traditional burn by only running quality burn spells and draw, a minimal land count and more consistency.
The list:
// Lands (16)
2 [OD] Barbarian Ring
3 [ON] Bloodstained Mire
3 [ON] Wooded Foothills
8 [TSP] Mountain (1)
// Cantrips (16)
4 [FUT] Street Wraith
4 [IA] Urza's Bauble
4 [CS] Mishra's Bauble
4 [LOR] Needle Drop
// Burn Spells (28)
4 [R] Lightning Bolt
4 [LG] Chain Lightning
4 [CHK] Lava Spike
4 [TSP] Rift Bolt
4 [EX] Price of Progress
4 [VI] Fireblast
4 [NE] Flame Rift
// Sideboard (15)
SB: 2 [SC] Sulfuric Vortex
SB: 2 [10E] Pyroclasm
SB: 1 [MM] Cave-In
SB: 2 [DS] Dragon's Claw
SB: 1 [R] Red Elemental Blast
SB: 1 [IA] Pyroblast
SB: 3 [10E] Guerrilla Tactics
SB: 3 [10E] Smash
(The sideboard is still partially work in progress, most due to metagame)
Card Choices:
Only 16 lands: by running 12-16 cantrips, these are enough! Also, cantrips and fetchlands make barbarian rings stronger
Needle drop: cantrips 13-16; the drawback is irrelevant in a burn deck, and 1 red mana for 1 dmg and 1 card just makes this an instant-speed, overcosted and damaging bauble / wraith.
Other slots: best-efficient burn suite. PoP is a must in the format, and can be sided out vs basics; 4xfireblast with only 8 mountains seem too much, but actually aren't: in a 16-cantrips, 6-fetchlands, 60-card deck 8 mountains have the occurency frequence of 19 mountains in a 0-cantrip, no-fetchlands, 60-card deck.
Not included:
Mogg Fanatic: this can be substituted for needle drop; but he never deals more than 1-2 dmg so is subpar. Only useful for defence; but I want to go to the dome, pure attack - no defence.
Incinerate: there are better options: flame rift costs the same and deals 4 instead of 3 (and is the worst burn spell of the deck).
Magma jet: subpar burn, and the scrying just improves card quality, not quantity; with 16 cantrips, I have sufficient draw, and all cards drawn are useful; it is very rare, in this build, being mana flooded.
Sideboard: this is most metagame choices: smash is a last-second addition because of the presence of CoTV in my meta (anything better?); in case of need, I usually side out needles, flame rifts and/or PoPs (depending on my opp's nonbasics count).

