For me it would be:
T1: Jeskai Control, Golgari, Izzet drakes the version with Dive Down to protect Niv.
T2: Boros, WW, RDW aggro
T3: Angels, Mono Blue, Fake news, Tokens, Arclight Pheonix
T4: Everything else

The hell is an S deck?

S tier doesn’t always exist but sometimes there are one or two decks that are so above everything else, there is a S tier that is above the rest

To draw an example from Duels, the Acid Moss ramp decks would have been S tier

A better example would be that there were many boy bands in the 90s, but one rose above the rest to earn the moniker of "S Club 7"

Then I feel honored to be the boy band. Who cares that mjack said it. Lay off!!!

Wtf is that?

Dimir Disinformation Campaign decks

S is a grade used above or instead of A+ in various Japanese mediums. This became so popular in Japanese video games that it spread to the "Western" market, and it eventually spread to other "Western" media as well. The TCG/CCG meaning has come to mean anything that is in a Tier all it's own, or "Tier 0", because nothing else can compete with it. In MTG terms these are often the cards and/or decks that end up causing Standard bans. A famous example is the now infamous "Caw Blade" meta that led to Jace, the Mind Sculptor and Stoneforge Mystic getting banned. Another famous example is Skullclamp.

So Moroii + Followed Footsteps?

Excellent - my current primary deck isn't any of those, so I'm in the bottomfeeding cesspool of awesomeness. Mission complete.

Grixis LD control. 9/10 wins is by consession. It takes forever to climb the ranks(a game easily takes 20+ minutes), so I'm still somewhere in gold.

Ugh I hate the meta, and will probably hate the meta each time there's a new release. I can only stockpile so much gold and gems to do drafts while waiting for the constructed meta to shake itself out. I could stockpile wildcards, but that's just gambling I'll hit upon a deck I want to play. I was stupid enough to blow all my gems playing M19 draft, too. What kind of masochist would do that?!

Need a cheap, reasonably competitive deck I can build to grind quick constructed before committing to an established deck. Monored?

Mono blue is very powerful, and also real easy on the wildcards (literally the only rare/mythic required is Tempest Djinn, everything else is common or uncommon)

Also a blast to play as well,FWIW

I played quite a bit of monoblue in GRN. The deck was cheap but not very good then, why would it be good now? The only real upgrade I'm seeing is the UU counter that puts a +1/+1 counter.

T1 mono red cheap ass deck:

1 Fanatical Firebrand (RIX) 101
19 Mountain (RIX) 195
4 Spear Spewer (RNA) 117
4 Ghitu Lavarunner (DAR) 127
4 Viashino Pyromancer (M19) 166
4 Electrostatic Field (GRN) 97
4 Shock (M19) 156
4 Lightning Strike (M19) 152
4 Wizard's Lightning (DAR) 152
4 Risk Factor (GRN) 113
4 Light Up the Stage (RNA) 107
4 Skewer the Critics (RNA) 115

Mono u won the twitch streamer tourney and top 4'd a few GPs during GRN. It's a strong deck, just really fiddly to play well. Super frustrating to face sometimes. I guess its mono red matchup isn't amazing, so maybe it's not ideal for bo1 ladder, but it can still beat red.

I suspect that just running a random lifegain deck would be good at the moment on MTGA, probably auto-lose to a fair amount of decks but as long as you get enough mono red opponents you'd go positive. Bit more expensive than mono red or blue though, probably want some number of shalai/lyra to really go over the top of them.

As I said, I've played a lot with monoblue, and although I get that it did have some great performances (10-0 in the pro tour too) I have no idea how they did it. Sure sometimes it will have unbeatable draws, but it's just so unstable. It's not just failing to draw Curious Obsession (although that is a very noticeable fail case). Take for example this: you're on the draw against monored. They play turn 2 Runaway Steam-Kin. You lose, more or less, and you can't do anything about it because Essence Scatter only comes online when you have 2 mana. You might not even have drawn it. Here's another example. Take this hand: 3 Islands, 2 Dive Down, 1 Spell Pierce, 1 Siren Stormtamer. Keep or mull?

Having said all that, I'm not poor in terms of card availability. I did play a lot during GRN after all, and have a playset of Shalai thanks to playing so much Selesnya tokens. I just don't have RNA cards.

@Turbo - monored going all the way down the mana curve now? Not even running Goblin Chainwhirler or Runaway Steam-Kin? That's ... eye-opening.

Yeah, look at this mono red hand, 4 mountains, shock and 2 lava coils - keep or mull? You can't use a deck getting an awful draw as an example why it isn't good

I think people greatly underestimate mono blue's strength in the games where it doesn't draw curious obsession - sure when you go 1/1 into obsession backed up by counters and protection the game is easy to play, but it's the draws where you don't get that start where the skill really comes into play and the deck needs a good pilot to manage your resources into a win.

And surprisingly mono blue's matchup vs RDW isn't as bad as i thought either, i went into it thinking it was like 20% to win but there's a lot of nifty stuff about the matchup - I've managed to outrace great draws from mono red with stuff like sleep and countering all the stuff that matters or merfolk trickster ambushing creatures like ghitu Lavarunner and then just run away with the game with all the card draw, and that's not even including games with the obsession draw

Try it, farm gold, thank me later

That's easy. Mulligan, because you don't have enough damage. Monored's draws are better on average because the deck only does one thing; each card is good on its own independently. The same doesn't apply to monoblue. I grant that the hand I gave was pretty clearly a mulligan, but how about this one: 3 Islands, 2 Curious Obsession, 1 Spell Pierce, 1 Tempest Djinn. Or maybe this: 2 Islands, Curious Obsession, Wizard's Retort, Essence Scatter, Tempest Djinn, Chart a Course. Individually each of these cards can be great, but not together.

When you don't draw Curious Obsession the deck's a collection of bad cards and a lot weaker. Cards like Mist-Cloaked Herald simply isn't constructed-playable (it's barely limited playable either without ways to enhance it). Sleep is one of monoblue's only ways to race (the other is stabilizing behind a Tempest Djinn) and with only 19-21 lands it's not an easy card to play. Merfolk Trickster can ambush Ghitu Lavarunner, but if it's already done 2 damage, it's still no worse than Shock. I don't like monoblue. I can win with it, in fact I'd say I average about 4-3 with it in constructed events, but the deck feels like a crap shoot. If you enjoy it though, by all means, play it.

@Turbo - spent 3 rare wildcards on the deck, it's working quite well. Thanks! Electrostatic Field feels somewhat underwhelming. In many games it's scarcely responsible for 3 damage, which is bad for a 2-mana card. Why not play Runaway Steam-Kin?

EDIT: Boy, mana flood is a real problem with this deck.
EDIT #2: Deck took some getting used to - who knew the "count to 20" deck was hard? - but I went 7-2 in my first quick constructed event Thanks for sharing, would still consider subbing out the Electrostatic Field for Runaway Steam-Kin though.

Want to have a better chance of drawing curious obsession? Try running Sphinx of Foresight. How many i don't know but I would say running 3 lets you go down a land and would certainly increase your chances of drawing obsession.