The following are pretty irreverent:
- Player's 1v1 winrate - doesnt break down by opponent strength
- Amount of 1v1 games played - could be lottery games, not analysing games afterwards so no improvement, isn't template specific
- Amount of Idle Achievements - idle is a different game format altogether
Quickmatch rating can be misleading. Its activity based, not ELO based. Someone who's actually good could have lower rating than someone else who plays lots of games but is only 'average'.
Real time ladder rating - very few players took part and was common for there to be no competition to get first. The ladder was ladder removed because of that.
MDL is best indicator. Has many templates, covering a variety of settings and maps/bonus systems. Most popular in the strategic community. However there's probably more players in the 1v1 ladder than MDL so there isnt as much of a skill gap.
1v1 ladder is the next best option. Doesn't use third part site and is an unlockable feature with gets advertised once you reach the right level. 1500 rating is what is call average (not knowing/not checking move order, not making correct amount of picks, not getting good map coverage, not checking game history - to predict were the opponent is or to see which bonuses are wastelanded before expanding into them). 1700 is better than average. Top 50 are significantly better than average. Top 10 are best.