I have a few throws that I like to use in fights. Kosoto Gari (minor outer reap), Osoto Gari (major inner reap), Ouchi Gari (major inner reap), Kouchi Gari (minor inner reap. They require little effort, they are effective and you lose nothing if you don't get them. You can go right back to striking (i.e. knees). I if I miss a double leg shot, I'm in bad position. With these trhows I will ususally end up on top. Here's a clip with me using Kouchi, Ouchi and Osoto in one bout.