I've never been a fan of Prime combining. Just because he's the leader of the Autobots doesn't mean he needs to combine with someone to defeat a stronger opponent. Somethings like in Animated when Prime gets the jet pack actually makes sense, it's the nonsense combining in Armada and Energon that bugs me. Why does Optimus have to combine with someone? He's the leader of the Autobots he can't just go off and combine with someone else to try to take down every Decepticon. A real leader wouldn't go off and try to take down everyone he's not going to risk his life, he'll send another Autobot to take them down. I don't know it's just something I've always hated personally, so I'd like to hear what others think of Optimus combining with other Autobots.