RE GTS trading:
You're seriously overthinking it. The best way to trade on the GTS is to only do offers and never/rarely search unless you have a lot of time to waste. As long as your offer is relatively decent (IE Chimchar for Turtwig, Salamence for Dragonite, Zapdos for Moltres and so on; notice how fair the trade sounds?), your trade will probably be done in 24-48 hours, even less if you make a really good offer. I sometimes give away more common legends like Manaphy and Phione when I need a basic Pokemon and don't feel like breeding.
You're seriously overthinking it. The best way to trade on the GTS is to only do offers and never/rarely search unless you have a lot of time to waste. As long as your offer is relatively decent (IE Chimchar for Turtwig, Salamence for Dragonite, Zapdos for Moltres and so on; notice how fair the trade sounds?), your trade will probably be done in 24-48 hours, even less if you make a really good offer. I sometimes give away more common legends like Manaphy and Phione when I need a basic Pokemon and don't feel like breeding.