I built your list to see how it works before talking any more about changes. Only changes I made to the original were -2 Evolving Wilds, -3 Hubs, +1
Smoldering Marsh, +4 Renegade Map. Figured your energy subtheme wasn’t strong enough to justify hubs. Only way to refill is the 2 towers, but that better spent activating the tower. More important to have colors fixed and support Disintegrations. Went with Marsh over keeping a single Wilds since maps address color fixing blue and the Marsh will enter play untapped sometimes.
Tested 4 games. 1st game vs BG midrange I landed Chandra T4 and protected her with burn spells till she ultimated. 2nd game vs mono green stompy I lost to flood - no sweeper effects and only 2 creatures that can reasonably block makes flooding particularly brutal. 3rd game vs Rakdos Aggro I got tower in play and flipped TITI with Insult // Injury, hit for 14 and tapped tower to deal the last 6. I had been doubting Tower (feel it’s more a control deck win con than a card that should be in a burn deck - it’s on the slow side and your 3 mana spells in a burn deck should offer something when you cast them), insult // injury (feel it’s better for a deck with more creatures - a la gruul stompy or rakdos aggro), and TITI (good when it flips but offers no damage output before then), but the 3 cards were beautiful and fun this game so I see why you had them in. 4th game vs simic something (?) I won to opponents land screw.
In 2 of the games, the maps allowed Unlicensed Disintegration to burn face. In another, tower did the trick (in the flood loss game I never drew it). I think maps are right for the deck. No games punished me for running fewer total lands in place of them (happy to have in opening hand since not a lot to do T1 or T2).
Geistblast had a couple moments. I copied Alms of the Vein in one game for a respectable life swing, and Catalog in another. The catalog play probably won me that game. I was pretty even with opp, and drawing 4 cards let me trade a couple lands I didn’t need for more gas. I’d still cut that down to 1 or 2 copies tho. I’d never played with Catalog before. I don’t love that it costs 3, but instant speed discard has some value here. 2 copies prob ok.
Avacyn’s Judgment underperformed. It’s expensive to madness a significant amount of damage (no free discard effects, most costing 2+, meaning it doesn’t get better than baseline until you’re 6+ mana (5+ off the axe). I used it as a 2 mana spell a couple times, but couldn’t get madness value off it. Even at 5 (axe), 6 (reunion), or 7 (catalog) mana, you’re only getting 3 damage over 2 for the effort. Thinking this card slot could be better served by something else.
Early thoughts are - do maps change, lower curve if possible. Real glut of 3 mana spells, and all the fun stuff (geistcasting, insulting, judgmenting, etc) costs a lot of mana. If opp playing Aggro and drops creatures T1-3, hard to stabilize with almost all spells trading 1 for 1, two 0/4 creatures, and the bulk of your spells costing 3 mana with several not immediately improving your board state. Need to get some more games in tho.
Idea is fun. I reeeeaaally enjoyed that game I won with big insult//injury play. I don’t think it’s a bad deck, but see why you’re looking to improve as it does have some notable weaknesses.