best angle is green dot, but beware! green dot is an IAS and it increases with mach number, so don't select green dot if you are climbing to a high level. you can calculate the green dot at the target level, it is the actual green dot plus one knot per each level above FL 200. There is also a rule of thumb for calculating green dot based on weight.
Why not just push that little button labeled EXPEDITE and let the computers do their magic?
Still miss being able to choose either max angle or max rate, the 737 offered that as standard...