I blame Pathfinder; but my group is pretty optimised minded. That's not to say they're not great roleplayers, but they'd like to have a solid mechanical base to run that off.
Thank you for clarifying how power is relevant to certain things like blocks and maneuvers. That always confused me.
My remaining concerns are thus
1) Landmines: as I understand it, you don't need evocation to put evocation abilities into wards. So the Landmine ability could constantly trickle a powerful spell into the ward. My group would definitely start every day making some thaumaturgy wards before heading out (sacrifice a handful chickens etc.). I believe there's a section that says a ward needs concentration so likely you couldn't have multiple of them, but I don't want super powerful landmines to rule the game.
2) Evocation: this is a dense question, but how does one defend with evocation? I know you can create Blocks (shields and stuff) and maintain the spell, but the everyday block mechanic. Is it another Conviction + Discipline roll, and if so does it induce a stress? Or does a spell caster either choose to keep up a block or have to use something else like athletics?
BTW this community is great