DracoSuave
First Post
There's no reason you can't have a Battlerager or Tempest in Plate. You just won't get the feature's bonus damage when doing so.
Tempest doesn't give anything at all to a flail-user in plate. No off-hand weapons. And moving 1d10s to 1d6s in order to get +2 damage isn't increasing or giving the guy any benefit whatsoever. For x>1[W] powers, it's less damage. He's better off with One-Handed so he can have a total of +4 to his weapons. More accurate than a ranger in that situation.
Battlerager doesn't make him more accurate, so he'll -only- be getting temp hps, and not at a good rate either. When the ideal is a damage-dealing plate using double-wielder, you need to optimize with that in mind. From here, he can take Two-Weapon Fighting, Action Surge, all the great human feats, and his Paragon options are not limited either. His Dex will be good, so he can go into Stormwarden and truly shine as a dual weapon beast of smish.