I watch guys train and notice that work intricate combinations on the pads and do drills that involve a lot of thought. I find that the best combinations are simple. A good jab cross or a good 123 (jab, cross, hook) and a double jab will win a fight for you. All this slip, punch punch, bob and weave, punch, kick etc. is fun to work, but you don't see complex combinations in fights. There is victory in simplicity.