What are some unusual gearset combos that just work?

Has anyone found any fun combos for weapons that gearsets weren't designed for? I'll go first: I like to mix an LMG and a rifle with my Striker gearset. First minute of the encounter I throw as many bullets onto enemies as possible, then when my gauge is high, I swap to my rifle and use that amplified damage to ruin mid-range and long-range enemies.