The new content includes a few nifty light weapons for warriors that might pair well with your plan.That's not how it works. Increasing AGI will increase damage way more for Light weapon than for normal 1H; with high AGI, your Light weapons will end up doing way more damage than 1H, especially once you take into consideration that Light weapons are faster.
1) Warriors tend to be more effective with 1-H or 2-H weapons. The occasional light weapon (esp in early game) might help here-and-there, but long term if you want to use a shield, go with a 1-H weapons.
That was a quote from one of the team members.