To answer your question "how can you detect MHer":
Parser shows every click (selection) but it can't tell you if it was in fog or not. You gotta find time of selection (in parser) and then alt tab to W3 to check if it was under fog. Guys from hacks crew could explain it better, give you some advices etc. I can tell you that clicks in first 2 minutes usually mean MH but not everytime (Clock's rocket, you can be seen from higher places when you are checking rune spots, or when game mod is RD)