I use them in conjunction with hails of weapons fire on a jousting pass.
I've also had luck with reverse thrusting and shooting them myself with a fast-firing weapon when they're near the enemy. This is potentially risky though.
I am strange, but I can't use mines at all and mines can't be used on me at all. I was never killed by mine (now I'm not counting the times where I was speaking and dropped mine by typing accident on me). I prefer guns and razor, exploding things are.... Wrong, evil and who knows what.
I buy things I don't want to make an impression on people I don't like.