When double-clicking a transcendence scroll you will be prompted by the gump below.
By clicking on any of the checkboxes you will immediately improve that skill. Be warned there is no confirmation box.
The higher the skill the less skill improvements you will get from a transcendence scroll.
Amount:
0-49.9 = 20 skill points
50-74.9 = 15 skill points
75-89.9 = 10 skill points
90-104.9 = 5 skill points
105-119.9 = 2 skill points
120-134.9 = 1 skill point
135-144.9 = 0.5 skill point
145 and up = 0.1 skill point