Hi, I haven't played since HotS. I quickly got back into Diamond league but I think it's mostly because of my mechanics. When I lose it's usually some early or mid game timing and I don't how to counter it, e.g. today I lost to some sort of cyclone-SCV repair all in; when I saw the reactor factory I thought hellions for map control.
And earlier again I lost to some chargelot archon comp which I haven't seen since 2011.
So general advice of what is 'standard' would be appreciated. For example, I saw the player Serral usually get his 4th really early (or what was considered really early before) in ZvT.
Thanks!
