Charge in blindly with more than they can shoot at. You can beat both parking lots and Chimera trains this way.
I run a ten vehicle list with Vect. Depending on deployment I can have everything within assault range on the top of turn one.
The key is prioritizing. That manticore may look scary, but Chimeras are easier kill points plus if it is objective based the squishy guys inside dying will not help your opponent. Can you imagine having your opponent's entire army on your side of the board before you even roll a dice? It is too much to deal with. They collapse. High risk strategy, but huge reward.