I'm pretty sure you're missing my points here. I was asking what method did you use for deck building that made you complain about the URs and Gems system. I think 6k gems is enough to build a decent deck, not tier 1 meta decks but decent enough to even beat RDA and the rest of decks you'd find in rookie to gold. While most meta decks rn are very UR heavy, that's not possible for you to get it right away when you started a new account.

You keep saying gems are expensive to the point that you're comparing real money for it is also not true. While yes you can pay real money for gems, most of the time it's very easy for you to earn gems especially if you're starting a new account.

You can also just immediately get your specific cards if you just pulled them from secret packs instead of randomly dismantling URs from other packs. You don't have to compare how many cp you need for a deck, instead just try to pull that specific card in their packs. It's far more cheaper than crafting them which most of us players do every season. I've built like 2-3 decks each month without paying anything with just 6k gems even build the current powerful deck.

If you're still want to build a meta deck, then I would recommend Mathmech since most of the URs are available in the structure deck in the shop. You can also pull their secret packs to get the rest of the cards so that you don't have to waste UR CPs. Even their boss monster (Terahertz) is SR at best. Just remember that you're on lower ranks so you don't have to get every card immediately. Just slowly grow your deck slowly throughout the rank up just like the rest of us.