As someone with low budget in terms of gems and money, which deck would you recommend me to build to rankup?
There seems to be too many options, neos fusion/aromages/new ex deck/ritual beasts/Shiranui...
Shiranui is the strongest, cheap core but expensive backrow. It's on the chopping block next for the banlist. Ritual beast is not bad, it's hard to play, have to practice a lot. The rest: neos fusion, aromage and the new ex deck are not on the tier list, so a cut below even ritual beasts, not worth. If you need something now, ritual beast, otherwise wait for the banlist and go into Shiranui.
Neos Engine can fit into almost any deck. It's an Engine and it's not unlikely that some of the next meta decks might use it. Same goes for Invoked or Lightsworn.
They are telling you to use your money or gems on cards that will one day be powercreept.
Go for a burn-stall ç@ncer deck with lots of lava golems and lots of Amazoness Swordswomen. Even the best meta decks have to think a bit when they play against a half decent f2p ç@ncer deck that cost you zero gems and zero money
Stall always needed expensive backrow to do well. And we are way past the hayday of stall when we had ojama go, destiny draw and extra extra with no limit. Also the best version of stall right now uses ritual beasts.
Cyber dragon is 2 run through of future horizon, 1 run through of cybernetic rebellion and 2-3 cosmic cyclones. Not bad if you have cosmic lying around, otherwise not cheap.
You do not have to go for the most optimized/expensive stalls. The casual zero gems zero money stalls are good enough. You just need a few cards that Legendary duelists/PvE drop and you are good to go. Most stalls are so different from one another that you cannot always be prepared for them all. Just make an Original stall and even losing will be fun when you will feel your opponent's frustration.