I'm a 700k Mastery point Katarina main (M7, of course), with 300k on Lux (also M7), and around 300k on Vayne (again, M7) and have a few more M7 champions, I'm currently learning Syndra, Akali, Zed. I have climbed from Iron to Silver 2 in only a month or two, and am currently at a high LP level, and quickly climbing even higher. I've been playing for 6 years but only actually started playing ranked seriously a few months ago.