I'm one of the new android players coming from canada and android. I play clash royale heavily, some times i spend money, probably a total of 100$. so i'm not afraid to buy good valued deals. Because of this i have been able to get good results from my gameplay. i have been in the top 200 north american leaderboard. So i want to be as optimal as possible with brawl stars

Coming from clash royale, there are OBJECTIVELY BEST WAYS to spend your money, and then also objectively best ways to spend your gems that you get to maximize your returns in the game. This is usually revolved around buying 1 time purchase special bundles, and using the gems from those bundles on the challenge mode which has like a ridiculous return per gem for gold and cards.

What are the best ways to spend gems, and bets qays to spend my money to acquire new gems/bundles/characters?

I only want real suggestions backed by science/math, no opinions please. Only objective truths.

Example of objective truth: this bundle cost 2$ and gives 100 gems. therefore 50gems/1$. This deal cost 100gems and gives 500 coins/gold, therefore 5gold per gem. Stuff like that. What is the absolute best way to spend money/gems.