I remember talking to a Rogue fan and he said "What makes Rogue really dangerous is the fact that she can stack abilities.

Obviously, she can combine abilities (like telepathy, super-strength, teleportation etc...) but does her stolen/borrowed abilities stack? Like if she touched Thor a Class 100 character, then touched Spider-Man a class 25+ character, would she be able to lift the max weight of Thor, plus an extra 25+ tons?

I always assumed the greater ability just overlapped the weaker one. Like using the mental powers of Artie then upgrading to Professor X.

In my 30+ years of reading comics have I misunderstood Rogue's abilities?