Sliver (Pauper)

The deck is really fun and not so complicated to play, and I will leave here some guidelines after having it played with a winrate of 10 wins in 12 games of Bo3. (the winrate will be updated anytime I play this deck)

Game 1 will probably be yours since not so many decks have in the main all the stuff to tear down the zoo of slivers you can throw to them.
Game 2 is the turning point: you have to know exactly which slivers you don't want to draw agains the match up you are facing, if you do it correctly probably you can win one of the last 2 games.
Game 3: you are here for mainly 2 reasons, you lost Game 1 and now the deck is starting to play itself automatically or you made some very bad mistake in Game 2 getting overconfident on your first win. Remember to not keep a hand without a forest and a plains or a way to get one of those turn 2. You should not be in Game 3, Game 3 is a very bad enemy for slivers.

Rapid Guide on the attack declaration:
This seems useless, I know, but since I lost a game in this way now I feel the need to share this information.
Attack when you can. There are very few cases in which you prefer to defend your army instead of swinging them to your opponent's face. So, if you both and maybe both of you are topdecking are low try to be the aggressive one and take them in the defense mode. The more damage you put in the more your opponent will be unable to counterattack and play safe to see you cast another sliver or even a Lead the Stampede/Winding Way to get more gas.
TL;DR: look at your opponent's life total and if you are able to lower it, just do it.

Rapid Guide on Hand you like to have:

• 1 Plains, 1 Forest will always be a keep no matter if you have sliver t1 or t2. If you have same colors land try to avoid at least to have 2 plains. You NEED green to cast your 8 sorceries and get back on the sliver train.

Rapid Guide on casting your sorceries:

• There are two main possibilities to cast those: you have 2 of them in your hand and your opponent can counter only one of them, you are on your second turn/third turn and your opponent is tapped out! If you see that spot to cast them, you should do it: the more slivers you have in hand, the more aggressive your board state is, since your opponent knows what's coming next!

Rapid guide on generic matchups:

• Control: you win thanks to the sorceries, if you successfully cast them you are ahead no matter what. Your game plan will be to cast them and then go for the massive board state
• Aggro: it's a race, almost no skill involved, but slivers are very fast!
• Boros Rally/Monarch: The matchup is hard, but you are likely to win the first game if you are capable of throwing in 3 slivers in the first 2 turns, since the early turns the boros has access to one removal a turn and it's hard for them to catch you up if you zooed a lot! For the side just bring in Hallow 4x taking out the bladeblack sliver which is barely useless in this match up and you should be ok!

Rapid Guide on the side:

• against red spells, like lightning bolt, electrickery, fling (I look at you Affinity!!) always, always, ALWAYS take 4x Hallow with you.
• against aggro you need both of your provoke slivers and again the bladeback is getting cut off
• against control without red spells probably you'll need the Standard Bearer to redirect and probably Bladeback Sliver if they cut out the combat phase!

EDIT: I started to play this deck a lot so I'm getting more used to it, therefore I'll start to describe some of the most popular match up in the meta I find at my local stores:

Skred Fairies (U/R):
Tough deck to play against but the downside it has it's that it can go only one removal at a time! If you start to play two or more slivers per turn you will probably go over it. If it play Delver turn 1 and flip it turn 2 you will probably run out of time to get back with the board state. Remember to cast Lead the Stampede or Winding Way as fast a possible to go over their counters because late game you probably won't have time to cast them.

Temur Affinity:
It's a race: the frogmite is very weak, but it's an artifact so it counts for them to low down their spells... The Myr Enforcer is our worst enemy and since Atog is now protected probably the race is lost. But in most of the cases, since they have only 4 galvanic blast you will have 4/5 slivers on the board by turn 3/4 and in that case their life is veeeeery low so the race is gone.

Mono G stompy:
This is our worst match up. First thing first: keep a hand which includes a solid start since just by sitting against this deck we are behind.
A risky hand will cost you the match and you must avoid playing on the topdeck.
The win can be achieved if they let you zoo your board and the slivers are now way stronger than their creatures, since Mono G has a rapid start and will end up losing gas by turn 3. The Bladeblack sliver is the core to win since it lets us play on the defensive and then at the end of the turn will start firing the opponent face for a lot of damage, but the real mvp in this MU is the Gemhide, since it can help take the race at the same pace: if every sliver is also a land we will have 5 mana on turn 3 and we can play 2 more slivers in with a lead the stamped/winding way as a follow up.
By the way Mono G will always be the first that will control the match, no matter what, and the only thing Slivers can do is to stay strong and grow too big for him. I think the winrate will never be in Slivers' favour.