League of Legends XXV: Who is your Summoner, and what does he do?

[Lix Lorn]

By the way, what are everyone's thoughts on Mercenary from the defense tree? An extra 24 gold on a kill is not a whole lot, but on the assist it is nearly a 25% increase in gold gained. Of course, you are basing it on the hopes of getting enough of either to make it worth it...

In my uninformed opinion, it's a snowball. If you start winning, you'll win MORE, but if you're trying to catch up it's basically useless.

So I want to try Dominion. HOW I DO DOMINION. What do I need to bear in mind? What characters are good?
What characters use Ionic Spark? It looks fun and I want to use it.