Let's see, there are four bandits in this mission. You guys forget to use the wingman!!! Order the wingman to kill one of the bandits. You target one of the other bandits from long range. Kill him, then use a heat seeking fire-and-forget R-27ET for the third bandit, and the last one you can either use your wingman again or go guns on him. Also, you should deploy flares pre-emptively. That R-60 will never hit you if you deploy flares pre-emptively.
If you fail in this mission, you really need to start practicing more.