could a godtier tavros kill a regular vriska or is she just that good/he's that weak

It’s really hard to tell like, God Tier helps you unlock your power faster, but you can be non-God Tier and still have powers relating to your Classpect. Furthermore, as a Page, even going God Tier would mean little, he’d have to become fully realized first. Fully Realized Tavros? Easily, Pages are notorious for being one of the strongest Classes at high level. Other than that though, not quite sure.