Buy or die...hmm better deinstall. I am honest, if you cannot grind and do not want to spend hundreds of whatever currency, this is not the right game for you. That's not meant ironically. Play s.th. else. Be aware of the fact that the invested money never ever is worth the virtual things you get. But I think this is nothing new to you.

I do play it f2p since about two months and there's almost no progress. I am lvl 60 since 3 months or so (～12 Mill. dmg at cb 5 per key, 15 to 22 at cb4) and got some good champs, but I am pretty bored after reaching this state. No real new content, no progress. To get better I need new champs which got to get geared with good artifacts. That's not possible as a f2p or lowpay2p player. ;-)