MoD vs Perception

[Anmercey]

What level of invisibility is necessary that the person didn't notice?
How many detect stealth points give Preception?

[Wessty]

What level of invisibility is necessary that the person didn't notice?
How many detect stealth points give Preception?

I don't know the exact answer to your question, but having maxed MoD isn't going to help you in avoiding detection when a human pops perception. The stealth buff from vanishing negates perception entirely though.