If you haven't noticed / heard yet you can just AFK the invasions and you'll still get the XP and rewards.

I'm not normally one for AFKing == winning but if you're on a PvP server this is an easy way to get those invasion rewards in contested zones. (Hillsbrad is so much fun though, almost as good as the old days). On Sargeras the horde don't like to let the Alliance help with the invasions (Focus on PvP rather than the invasion), this is fun but since I'm in PvE gear it's kinda painful.

You'll also get XP if you have a team that hasn't hit 100 yet.

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