First of all, I have somewhere in the ballpark of 70 - 80 games played thus far. Most of this was a few months ago, before the map rework ect. I recently came back and played a couple games and have noticed that I was being placed with people on various teams and dawnscout told me I was Gold while they would be platnium or diamond, I also have seen a couple Silver tier. How does this placement get calculated? And how come I am getting placed in such a large array of skill levels? Lastly, where could I find information on some general meta atm, I used to like playing mage types like Zalgus, Amarynth but I feel they are very weak currently, where as before I always felt super strong on those shapers.

Thank you for any help!