Katarina Runes

So I've been playing Kata quite a bit and recently I saw that conqueror is a thing on her. The thing is, I can't figure out how to abuse it. High elo players seem to have the time of their lives with conqueror Kat. I usually run Electrocute or Dark Harvest but it appears that it depends on the match up what kind of runes work the best. So my question is, what do you guys suggest against match ups that can poke a lot or for example the ones where you can not really trade them and how exactly can I abuse conqueror in match ups in which it works well ? Thanks in advance {{sticker:katarina-love}}
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