BiohazarD said:
There's a fairly low limit to the number of chests you're allowed to buy though. You can only ever buy a total of 3 class 4 purple chests (and 3 blues) with sapphires. If you don't get what you wanted from those, the only other options are to buy packages with real $ that give chests or level up your bgs.
You get enough chests from Tower and league brawls. If you know how to open them, then getting a complete set of equipment is fairly easy.
I didn't say you have to stay low level forever. I said until you have discovered the StoneHeart and have completed upgrades for most buildings. You don't want to be a level 80 player who is asking for Heraldic scrolls.
Once you have completed the basics, completing BG to level up your beasts is fairly easy.