Read these books before attempting world domination instead of HPMOR, you'll save yourself a lot of pain

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  Hard Reset Twilight gives her life to stop a changeling invasion. Repeatedly. by Eakin 36,358 words · 8,299 · 136
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  Hour of Twilight Twilight Sparkle was Celestia's chosen heir, and under her rule Equestria was destined to prosper. But then her friends passed, as mortal ponies always do, and she was left to rule alone. The years were not kind to her after that. by Starscribe 246,023 words · 379 · 30
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  The Moon's Apprentice Twilight Sparkle failed her entrance exams for Celestia’s school. Worse, she is a danger to both herself and others, resulting in her magic being suppressed. Dreams crushed and now one of the weakest unicorns, a nightmare comes to her. by Forthwith 412,134 words · 3,813 · 174