It begins with deck-building.
When I look at the weekly bans, I don't see what I cannot play. I wonder what cards have been left seemingly unopposed. I then examine what I have at my disposal to counter the usual suspects. I build a prototype deck on day 1 and test it. I gain 20-25 elo each day for five days and adjust or entirely redo.my deck as needed. Then, on Day 6 I use the experience and insight I gained from the past 5 days to boost myself up to 1300+. This earns me an average 15 points per win and I win over half my games.
It is important to take breaks if on a losing streak as the frustration of consecutive losses will diminish both your focus and confidence.
Step 1: Analyse bans/unbans for week. Predict which clans will be popular accordingly (eg: Campbell= Rescue, Ongh= Jungo)
You can now do a few things
2 (a): Use said released unbanned cards in a deck and likely reach 1300 comfortably after playing the week. (Honestly stuff like Rescue just ain't that hard to do well with)
2(b): Create a counter deck for the main clans unbanned. This way is trickier but is IMO more fun than just throwing unbanned cards together
For actual deck composition if you want to make things easy I'd go for decks that include at least one heavy damage, game changing card (like Zhu Tang or Xingshu) so you can 0ld to victory when needed.
Or you can choose to play a control clan like the Piranas to destroy above said tactic
I'ts all up to you
Personally I think one of the best clans to go for every week these days is the Fang Pi Clang, they have recently just become an ugly half deck force to be reckoned with even without Kerozinn Cr.
Shifou/Zhu Tang/Kusuri/Kamekun/Futoshi Ld/Tomoe/Ichiko
They have a multitude of cards that are either good or really good and are easy to mould with most other halves as they provide that heavy damage support with ample power/attack to get that damage through
Thats a fairly ambiguous job. What outcome are you looking for?
How long do you play elo for, every week? How much elo do you want to improve by? How long have you been playing UR for? What game modes are you most familiar with?
All these questions help analyze your "symptoms" per se of how you are not performing up to your standards in elo.
Further, are you looking for a long term improvement or just a week by week fix? I could give you your fish or I could teach you how to fish as many others could. A lot of "lessons" you will get will not provide immediate results and are often just simple generalizations you could find all over the elo forums with a little research.
You will often hear the same mumbo jumbo advice from anyone imo about how to make a deck, "Uh Damage reducers are good and power is good and damage is good... uh also maybe SOA and SOB", but a lot of small things about the game come out from practice and experience shaping your reactions and playing capabilities. Understanding why you would take a card like ruru over stompah or visa versa, for example, and why ruru is banned frequently and stompah is not are important concepts to realize in depth. That being said, there often isn't a black and white answer as to whether you should take A or B in a deck and this depends on how you interact with an opponent and how you literally play your cards.
Much more crucial than your deck is how you play. That said, you can get to 1300 with a deck without any bonus without struggling a lot.
Teaching you how to play good is a much much greater job, than anyone would like to do. Just play a little bit, think a little bit and you should learn the things, that will bring you higher in elo. It's a lot about mathematics and seeing what your opponents gonna do.