Cards I'm already cutting in the mentioned colours (I'm cutting 6 of each colour, 1 per guild and 10 colourless/lands):
Blue: Daze, Tolarian Academy, Impulse
Black: Dark Ritual, Phyrexian Arena, The Abyss, Nether Void
Green: Wild Mongrel, Nissa Vastwood Seer, Sylvan Caryatid, Cultivate, Kodama's Reach
Colourless: TKS, Reality Smasher, Scroll Rack, Ratchet Bomb, Ankh of Mishra, Icy Manipulator, Coldsteel Heart, Field of Ruin, Gemstone Mine (Unsure about the last 3, but they don't really often end up being played)
Hedron Archive is underrated and I recommend it more than most people. Memory Jar isn't a card I have experience with. It seems better in combo based decks where you're doing broken things and it's definitely a more unique card than Hedron Archive. Memory Jar seems strong enough and offers a nice build around option so I would include that if your cube runs combo oriented archetypes. I'd try to find a way to include both if your cube is larger than 360, though.
I want to cut one of these one drop red creatures in my 360 unpowered. If you could rank them that would would be great, or provide a bottom 3:
I honestly feel like none of these cards are clearly better than the rest, which makes this so difficult. The card I want to cut is Monastery Swiftspear. Even if you don't think Monastery Swiftspear is the weakest (or among the weakest) would you say it's a clear mistake to cut it over something else? I run a fair amount of Vampires, so Gorger gets a very, very slight bump. I also run a lot of Humans, so Stromkirk Noble gets a decent bump. Soul-Scar Mage has more synergies than it seems at first glance (for example, flip Garruk goes great with it and persist creatures are easily dealt with). I think Legion Loyalist is underrated. Monastery Swiftspear is clearly solid, but doesn't do anything special or unique. Obviously, I'm trying to talk myself into picking Swiftspear as the cut and maybe trying to convince you all to tell me that. But what's your opinion, despite what I've said here?
They're very different. If you're looking for an additional piece for aggro and midrange decks to use as disruption, play Dust Bowl. If you're looking for a way for control decks to deal with problematic lands without going down resources, play Field of Ruin. I play and like both.
Jailer > Faith's Fetters > Quarantine Field. Palace Jailer is a huge bomb and is very abusable, it's very worth the risk.
Not too happy with any of these, but gun to head: Whisperwood Elemental = Vizier of the Menegerie > Wolfir Silverheart = Conclave Naturalists. I feel like you could do much better in the 4-5 cmc green slot though.
Consuming Vapors > Dark Salvation > Black Sun's Zenith. Yahenni's Expertise is a lot more useful than BSZ if you're looking for another sweeper.
Volcanic Hammer >>> Devil's Play. Incendiary Flow is a strictly better Volcanic Hammer if you're already maxed out on Incinerate variants.
I've loved Memory Jar but it can do nothing if your drafters don't really wanna try to break it. Super duper easy to make it one-sided. I like it in mono-red but 5 mana for a wheel of fortune is a lot. I love it in artifact decks or ramp decks to barf permanents everywhere. If you can recur Memory Jar, it can even become a goofy mill wincon. I haven't tested Hedron Archive enough but it seems sweet.
I remember a few years ago that Consecrated Sphinx wasn't very popular and everyone ran Aetherling. Now the reverse seems true. What's the deal? After losing two games to Aetherling recently, I still like it.
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At 450+ blue has room for both plus Torrential Gearhulk. At 360 maybe you'd cut the Aetherling as it is more of a seven drop than anything, doesn't provide value until you can swing with it and while usually an attack with Aetherling will win the game, it can take a while if you have to keep blinking it to protect it and protecting it also costs you the ability to block with it which does come up.
1: I think Warkite is best here. Can't really comment on Nimble vs Kira, but my gut says Nimble might be a little better.
2: I'm not super into the Bouncer, but it can be pretty clutch. Some decks just want a looter, but for decks that really want to pitch something quick I sometimes prefer the Bouncer just to stay alive. I could see running either, but I run Bouncer + Merfolk Looter at 450. (As well as a lot of stronger loot effects, of course)
3: I really don't like either. I suppose I'd sooner run Volcanic Hammer, but there has to be better options for burn.
4: Gonna say Broken Bond, just because it's a new card. The more people who test it out, the better. Naturalists never impressed me.
5: Depends on your concentration of humans, I suppose. Champion has never worked out for me, and I used to run a pretty big human theme. Like #3, I feel like there has to be better options. I would prefer any of the many 2-power 1-drops to these cards.