"Do Mages need warping effects? They have twilight scars" True. Maybe I just haven't played a magus that has stacked a long list of them yet, and maybe that space on page 3 is needed. But I still think the talisman space is way too small regardless.
"Which values should be derived? Not all that many values are static" Should is debatable and is going to vary based on usage. Can, can actually be pretty large. Combat totals can be derived from stats, equipment and specialization. Ability/arts score can be derived from experience, lab stats can be derived the sum of lab stats, magic theory, applicable arts, aura. Lab stats could be derived from virtues installed, size and refinement (or it could be derived manually and then auto-computing that which changes all the time, for example Int+Mt+Form+Tech). An example of what I did in Excel: I have 3 labs I can access, detailed per covenant, each with different auras and virtues. So each lab has stats. When I do a lab season, i select the name of the lab, what season (because I coded cyclical magic for some seasons), which activity (based on covenants lab spec stats) and whether I'm experimenting, and my spreadsheet auto calculates my base lab total for the 50 arts combination based on my arts scores, magic theory, the lab stats and local aura and the bonuses from virtues applicable to specific activity. It stops short, of course, of computing bonuses that are too situational to be automated, like similar spell effects, shape and material or magical focus. But it does add things like inventive genius which has the same kind of bonus you can find under lab specialization. And if I had requisites, then I just look at two lab totals and take the lower. But it saves me a ton of time recalculating totals for every season, since I just update my scores and I can glance at my lab total and say "Yeah, its finally time to take on that project" because I know without taking out my calculator that I can finally do it in a season or two.
Of course, there are always interface limitation, and since I'm not sure what they are for the project you're working on, I'll let you figure out how practical those ideas are for that project. I just work with excel