User blog comment:Emptylord/Season 3 - PBE Patch Notes/@comment-50.148.105.185-20121126152614/@comment-3974211-20121127133802

I guess you meant to say 1100.

But I'd personally wager 700. By offensive and defensive I think they mean aggressive and passive; a shield is an aggressive effect, not a passive effect. It grants no benefit out of combat.