The trick to SD-Luna and Luna in general is not letting her come online. One of my most frustrating losses was once when I stomped mid as a Viper and we were ahead the entire game, but because my carry slark didn't want to ever group up with us while getting constantly picked off, we could not end the game early enough. Then during one highground push, team overextended diving past rax, getting us wiped, and in one wave the SD-Luna pushed and we lost the game.
What makes techies so strong is due to the timing. You make the lane difficult for the Luna (with or without SD), thus slowing her farm while ensuring that your offlaner is getting fat enough such that they can control the tempo past 10mins in the mid-game. In such a situation, the enemy carry will almost always have less net worth thru 10 minutes than either me, the offlaner, or both depending on who gets the kills and how well the offlaner was able to farm lane.
Hell I just won a game with a VS/techies offlane vs SD/Luna because my LC wanted to jungle instead of offlaning so the two supports went. As a bonus, our mid SF had 0 kills.
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Katsuki is by far more absurdly beautiful than Fate. (hai parama)Katsuki's Madness coming to you shortly: Nov, 2011! Cupcake Mafia II coming to you summer 2011! ~ Pre-ins: 10/13