Name all the ways to to lighten a cantilevered I beam with a point load on the end, while minimizing weight and deflection

Mechanical Engineering Cantilever Beams
1

Name all the ways to to lighten a cantilevered I beam with a point load on the end. Minimize the mass of the I beam while keeping the deflection as low as possible.

2

Maybe some material with a good youngs modulus but with lighter density.
Other ways would be pocketing the vertical part of the i beam, tapering the i beam according to your moment/shear diagram as well.