...I also suspect you might not be a native english speaker. It's all right, I'm not either, but I feel like you are not understanding part of what I'm trying to communicate correctly.+4 perception with magical guidance for reroll a failed skill. Are you site about that.
Suck. Create a build that Challenges It.
Magic guidance won't help against enemies with good stealth, because, as you know, you won't get to roll. They'll just beat your low passive perception. The same will probably happen with traps and your passive investigation (8 int, ouch).
I don't really need to create a build. Any normally optimized single-classed rogue (with darkvision) will be a far superior scout to this sorcerer of yours.