1. Does Super-Speed interact with the damage cap in any way? Otherwise at the very least it allows you to apply damage repeatedly at the same success chance.
2. Does Death Touch work any differently with the damage cap since its normally going to deliver a lot more damage to hit points for anyone without Entropic Protection than a normal attack?
As written, the rules do not take special consideration of Super Speed or Death Touch into the damage cap.
That being said, GMs are authorized to disallow any build which they feel is abusive and detrimental to their campaign.
Hope that helps!
-Jeff