LOL You cannot say that because ALL the techniques shown so far in the scouter multiplied powerlevels which indicates that you can't say that the others wouldn't because 100% of the techniques shown multiplied powerlevels.
1. Because the red ribbon army has many tricks
2. Attack potency
Not to mention KP is 260 and Roshi is 200
Eitherway, if you believe it's an outlier or not ( i don't since it's canon, only people who cry because their fave chars lose call it an outlier , nope, he can enchance his defense with ki )
He would kill sensui
Show me which all techniques have multiplied the users power level....only kamehameha and special beam cannon have been shown to do so. Not to mention, Special beam Cannon has multiplied his power level even more than Kamehameha does, so this proves different attacks have different multipliers.
You still didn't answer me question about Tao. Do you believe the grenade has moon level potency because Tao got destroyed by it?
1. What tricks do they have? He didn't even try to blow up the RRA's base. If fodder RRA can beat Roshi, I see no reason why Sensui can't.
2. Its not just attack potency.
Chapter: 161, P13.4
Yajirobe: “But man, what kind of a guy are you?...I can’t believe you beat someone who could blow a city to pieces…”
What does this imply? It implies Yajirobe (who was on par with Kid Goku and Roshi), can't even beat a city buster. City busting was considered a great feat at that point in DB.
4. ^ (and even the word "city" is mentioned)
I'm not crying about which character can beat who, neither do I take VS debates seriously. C'mon bro, its just fiction.
Doesn't matter if he can enhance his defence or not, since he hasn't shown moon level durability (or anything above city level). He ain't close to beating Sensui or any upper A classes.