Personal opinion is at cube sizes of 450 on down - there isn't sufficient space to adequately support green ramp and green aggro. Of the two, ramp is the stronger package. I'd keep all of these and swap out a lot of the aggro pieces.
I'd cut Braids and Custodi Lich from the black creatures listed.
Nice to see some support for Baneslayer types -- I was pushing this same line in 2020 and the response was almost universally "nope, they're bad, thanks for playing" and then inevitably someone questioned the removal in my cube -- usually without looking at my readily available list. While power focused cube lists do have premium removal, the opponent still has to have it and have it before too much value has been accumulated. There's always going to be a place in my cube for the best 5CC threats that swing the game when unanswered even if they are susceptible to removal.
At 6CC on up I think you do have to insist on immediate value or self-protection -- the only 6CC and above creature I run that doesn't meet that standard is Consecrated Sphinx and this is because the card draw it generally provides makes this card worth it even without these features.
1. I like Hellkite and Phoenix. Don't care for the others.
2. Sorin
3. Duress > Dread Fugue > Despise
4. Plaguecrafter
Azorious Cards
Geist of St. Traft has definitely fallen from favor from the cubes I've observed. I can see your 720 cube runs 7 guild cards deep so I'd probably rank what you've listed, what you've got, and a couple other considerations accordingly.
1. Fractured Identity
2. Teferi, Time Raveler
3. Supreme Verdict
4. Teferi, Hero of Dominaria
5. Dream Trawler - Think this is better than Dragonlord Ojutai.
6. Yorion, Sky Nomad
7. Reflector/Queller - These two are dead even for me.
Cutting the multicolor section in my 450 down from 5 to 4 cards per section in order to add 5 slots for artifacts and an additional slot for each color. Want some opinions on a few of these guilds.
Azorious
I'm cutting Soulherder for certain (Love the card - but just doesn't compete on power). Need help on Dream Trawler v. Supreme Verdict though. Dream Trawler is the bigger outlier I think, but I love the idea of Azorious having a classic control finisher. I'm not sure that I need another wrath, but including one could allow me to cut one of the weaker wrath variants (Doomskar) from my white section.
Golgari Abrupt Decay vs. Life//Death
I know Life//Death is the bigger outlier but reanimate even for one more is still very good. Decay is of course also a great card, but pretty redundant with other catch all multicolor removal (Pulse, Trophy).
Boros Boros Charm v. Lightning Helix v. Aurelia, Exemplar of Justice
I used to run Isochron Scepter which I thought was pretty good w/ Boros Charm, but I have since cut the Scepter and I think that Boros Charm is probably worse than Lightning Helix so probably would leans towards cutting the charm. Could also cut Aurelia, but I think she's a strong draw to play a Boros deck and a nice top-end threat for a lot of R/W decks.
Bone Shards (but I don't run either)
Maul > Dancing Sword > Ancestral Blade - Maul is just narrowly outside of my 450 unpowered list, at 540 I would run it
Meloku > Kefnet > Iymrith (I run Meloku and Kefnet)
Ranger Class > Dustwatch (I don't/would not run either)
I'm a bit late on this but why Deliberate over Omen of the Sea? Isn't Omen of the Sea more often than not just Deliberate with additional upside? I mean if your cube goes deep on spells matter I could see Deliberate getting the nod, but otherwise I'd go Omen.
Omen of the Sea > Deep Analysis
Entity > Crusader
Neither.
Archon > Approach.
I recently replaced Tezz, AOB with Fallen Shinobi based upon trends I'm seeing in cubes which are similar in makeup to my own and not really having the artifact package for Tezzeret.
I'd cut Braids and Custodi Lich from the black creatures listed.
At 6CC on up I think you do have to insist on immediate value or self-protection -- the only 6CC and above creature I run that doesn't meet that standard is Consecrated Sphinx and this is because the card draw it generally provides makes this card worth it even without these features.
2. Sorin
3. Duress > Dread Fugue > Despise
4. Plaguecrafter
Azorious Cards
Geist of St. Traft has definitely fallen from favor from the cubes I've observed. I can see your 720 cube runs 7 guild cards deep so I'd probably rank what you've listed, what you've got, and a couple other considerations accordingly.
1. Fractured Identity
2. Teferi, Time Raveler
3. Supreme Verdict
4. Teferi, Hero of Dominaria
5. Dream Trawler - Think this is better than Dragonlord Ojutai.
6. Yorion, Sky Nomad
7. Reflector/Queller - These two are dead even for me.
Cube for Reference: https://www.cubecobra.com/cube/list/1028
Azorious
I'm cutting Soulherder for certain (Love the card - but just doesn't compete on power). Need help on Dream Trawler v. Supreme Verdict though. Dream Trawler is the bigger outlier I think, but I love the idea of Azorious having a classic control finisher. I'm not sure that I need another wrath, but including one could allow me to cut one of the weaker wrath variants (Doomskar) from my white section.
Dimir
Fallen Shinobi v. Ashiok, Nightmare Muse
One is a fun though often unpredictable effect the other a fair and flexible PW.
Izzet
Saheeli, Sublime Artificer or Fire//Ice
Mediocre spell or mediocre PW?
Golgari
Abrupt Decay vs. Life//Death
I know Life//Death is the bigger outlier but reanimate even for one more is still very good. Decay is of course also a great card, but pretty redundant with other catch all multicolor removal (Pulse, Trophy).
Boros
Boros Charm v. Lightning Helix v. Aurelia, Exemplar of Justice
I used to run Isochron Scepter which I thought was pretty good w/ Boros Charm, but I have since cut the Scepter and I think that Boros Charm is probably worse than Lightning Helix so probably would leans towards cutting the charm. Could also cut Aurelia, but I think she's a strong draw to play a Boros deck and a nice top-end threat for a lot of R/W decks.
Simic
Nissa, Steward of Elements v. Edric, Spymaster of Trest
I love both of these but I think Uro, Oko, and Krasis are better than these so one must go.
Bone Shards (but I don't run either)
Maul > Dancing Sword > Ancestral Blade - Maul is just narrowly outside of my 450 unpowered list, at 540 I would run it
Meloku > Kefnet > Iymrith (I run Meloku and Kefnet)
Ranger Class > Dustwatch (I don't/would not run either)
Condescend, Opt, Memory Lapse, Daze, Forbid, Fact or Fiction.
2) Cut one for Abundant Harvest:
Kazandu Mammoth, Bala Ged Recovery, Tooth and Nail, or none of the above.
3) Cut one for Ignoble Hierarch:
Gilded Goose, Hexdrinker, Paradise Druid.
4) Cut one for Damn
Vanishing Verse, Anguished Unmaking
Entity > Crusader
Neither.
Archon > Approach.
I recently replaced Tezz, AOB with Fallen Shinobi based upon trends I'm seeing in cubes which are similar in makeup to my own and not really having the artifact package for Tezzeret.
I've got one for you. Cut one for Elder Gargaroth - Acidic Slime or Kalonian Hydra
Narset, Parter of Veils or Jace, Mirror Mage?
Soulherder vs. Reflector Mage
Fallen Shinobi vs. Tezzeret, Agent of Bolas vs. Ashiok, Nightmare Muse
Falkenrath Aristocrat vs. Vial Smasher the Fierce
Archon of Coronation > Harmonious Archon
Jace Beleren > Court of Cunning (unless your cube supports mill)
Arena over Court of Ambition