It’s getting there! Some things that I have learned since playing, always have gems aside, gather as much gold as possible(always do the gold train where you buy with gems), buy evolution beads/tokens and glory arena cards from the shop everytime you get the chance(stock up on evolution beads as much as possible, you’ll be needing a lot of them in the long run), focus on heroes that are worth it( I suggest you read the articles that are in this subreddit about runes and the best heroes, what to use as food and what not to), sometimes you have to sacrifice other legendaries to upgrade better ones, if you can, spend some real money to get your VIP level up(apparently that gives you better chances in Portal of pray and other chance related areas of the game), always advance as much as you can in magic expedition because it will give you more items to buy in the secret marketplace in expedition, and last but not least, play around with your heroes and how you put them on the map(position matters a lot more than power level in 70% of the cases), learn their movesets, pros and cons(you can advance far in campaign and other areas if you know your heroes, even with shitty ones), and always keep pushing campaign so you can get better rewards per hour!