and there are NO significant obstacle problems, thus achieving the required gradient at a higher weight than at standard speeds.
Very much a case of massaging the numbers to get the closest to whatever you seek.
You can go for
(a) better climb - period
(b) better climb capability - now we can increase the weight to bring the climb back to what you need either for WAT or obstacles
(c) improved obstacle clearance - not for close-in obstacles (straight away they are compromised by the net flight path's being lower initially due to the longer TOD - however, once the overspeed NFP intersects the min V2 NPF, the obstacle profile is enhanced (read either improved clearances or add some weight to reduce the sums back to minimum requirements).
(d) some mix of the above ....