IMO if you need to go light then a modular, building blocks approach to a rig is best way. I've done this for the last 10 years.
My main rigs have been 1, 2, or 3 112's. I even had a 212 and 112, but that was a little too heavy. I believe GK Legacy heads go down to 2 ohms so you can use any combination of cabs. My Ampeg 410 weighed 90lbs. No one needs to carry that much weight anymore.
I've tried 210's but they are heavier and the 112's on the market these days are very, very good and have no down sides.