Optimizing a surface slope using Kangaroo

Hello all,

I wish to optimize a triangulated mesh surface that is made with delauney from a grid of points with different heights.

by changing the z coordinates of the points I wish to rotate each face that it will be in around 5% slope.

using Galapagos turned out to be very slow, because there are many faces.

I was wondering if I can do this with Kangaroo- trying to match some how the angle between the face normal and the Z vector, to a 5% slope (around 2.85 Degrees).

is this possible with Kangaroo? and if so what should be the approach?

thank you very much!

Yoav