With a twin you get more options with more options come more choices with more choices the option to make the wrong choice!!!
To that I would add that while most light twins struggle at grosse to make a climb they fly level very happily.
If you are in an area of fairly low ground without major obstructions even at 400 feet why not go for level flight at least till you have sorted yourself out! Then ease out a climb bit by bit?
Pace