I have been playing around with a new monster type, the Savage. A Savage is an Elite monster that is buffed up enough to challenge a party as a Solo. They can hit hard without taking without taking all night to run. Since they die more quickly than a traditional Solo monster, you can afford to be a little swingy with their offensive power; their lower hit points are balanced by their "savagery".
-Immunity to status effects such as stun and dominate
-Saving throws at the beginning and end of turn
-Attacking at their Initiative and Initiative + 10
-Multiple attacks per turn as a single Standard Action and/or Minor and Free Action attacks
-Free Action attacks when bloodied and/or dying
-2 action points
-An auto-damaging Aura or the equivalent
I'm using them in Ravenloft currently and they can hit you hard without taking all day.
Look for some example Savages on my blog soon!