Damage is based of your total resource amount for a given resource pool such as stamina or magicka (note a few things scale of health). That goes for basic attack like light and heavy and abilities in a particular line. Even if you consumed all of your resources the damage remains the same because it's tied to your max amount.

Here is a good site that will help you predict how much damage a stat will increase your damage. It doesn't show heavy and light attacks but basically the higher your resource pool is the more damage it will do from attacks tied to that resource. Just search for a skill in question from that site and it will let you know which resources will increase the damage and by how much. Roughly 10points of a stat is worth 1damage, it varies but it's a close enough approximation to give you a rough idea.

Side note - Staff attacks scale of stamina and weapon power but the abilities in the staff line scale off magicka and weapon power. Non staff weapons scale their damage off weapon power and stamina for abilities. Class abilities scale of magicka and spell power. Class ultimates scale based on which stat is higher.