I've never used any tools or kits to mount a scope.
If I'm feeling precise, I use a level.
The screws/scope/rings aren't made of glass and you're not trying to torque head bolts either.
Tighten them like you would most any other screw about that size and be happy.
I didn't even know those kits existed and I never thought about the specific torque numbers until I joined a forum.
Don't over think it. As Brian pointed out, a level is about as fancy as you need to go.
I do tighten my screws evenly. That is tighten each one a little, in order, until they are all tight.