That's a good effort without maxed summoners, most of mine are maxed and I always end up settling for Champions 3.
I know I could make Champions 2, but I just get annoyed every time I come up against someone with 5000 points I just log off, which happens quite a lot!
Also I think I enjoy the investing aspect more than playing the game.
I'm sure there's a better quality of reward higher up, nice Orbs there!
I love the battling side of it. Getting my daily quest reward and climbing the leagues. Funnily enough I have a second account with level 4/5 cards and it gets much better rewards consistently. More gold/ legendary cards and more orbs even with a smaller quantity of prizes it does a lot better.
I was surprised to get up this high to be fair. I don't know how it happened as usually when I got near the top of diamond you run into the maxed out teams and struggle. It must have just been a lucky run I guess.
I'm sure your investment will pay off in the long run. I love the team behind the game and if they keep developing at the rate they are it will be huge in a few years.