Armor doesn't really matter and there's like a dozen shields that would work for this strategy.

It's a RPG game, you're supposed to adjust your build for the challenges you're facing. There's a respec mechanic and by the time you reach her you can have at least 6 fully upgraded weapons if you need variety of tools. If you've played for long enough to reach her you should be able to understand game's mechanics and use them to your benefit.