Stefka Kerensky, on 26 June 2016 - 08:39 AM, said:
Anything without at least 2-3 matches per day is a joke.
(60-90 per month?)
edit: I mean, the minumun should be around 60-90, and the ladder should be monthly based
Way too high. You're effectively screening out weekend warriors. There are a lot of people who only get to play once on a weekend, and only manage ~10 matches on that one day. And even at that rate, saying 40 requires them to play every weekend.
So... I'd say min 30 to qualify. That's still a high enough number that it's difficult to game it, at least in the solo queue.
Which brings up another point (already suggested) - absolutely must split solo and group queues. It's far too easy to game the group queue with a unit. So easy, in fact, that group queue games probably shouldn't count in any leaderboard. The leaderboard should be solo queue only.
I wouldn't split it out by Tier for rewards, but I'd provide a filter by tier just so you can look up how you stand within your own tier.