-Goku and Piccolo both say that you shouldn't come if you don't think you can help. With the knowledge that the Androids are stronger than SSJ Trunks (Mecha arc), yet all 3 of the humans show up.
-Tenshinhan says he left Chaozu behind because he didn't feel like Chaozu was strong enough, which suggests that Tenshinhan does think he is strong enough to fight the Androids who are supposed to be stronger than SSJ Trunks.
-The Androids state they can get a large amount of energy from Yamcha:
Would two guys who should atleast be stronger than or close to Freeza really consider like ~3,000,000 (at best) a valuable source of energy?Chapter 338 (DBZ 144), P11.4 wrote:No.19: “No, it is not Son Goku…He doesn’t match the data. There’s a 96% chance this is the human known as Yamcha…”
No.20: “At any rate, we’ll be able to obtain a large amount of energy.”
It's not until after Yamcha tries and fails does he want to not fight, meaning he was planning to fight the Androids all along, knowing they are stronger than SSJ Trunks (Mecha arc).Chapter 340 (DBZ 146), P3.2 wrote:Yamcha: “Fra-frankly I don’t want to go…Sorry…Those guys…nearly killed me and I was helpless to resist…”
-Piccolo tries to stop the humans from fighting 2 times.
Chapter: 345 (DBZ 151), P6.6 wrote:Context: after Tenshinhan, Gohan, and Kuririn want to chase after No.20
Piccolo: “I understand…But don’t try and fight him. He’s not an opponent you guys could handle…”
Yet he had no objection to everyone wanting to fight before the Androids appeared.Chapter: 366 (DBZ 172), P14.6 wrote:Context: as Piccolo goes to fight the androids
Piccolo: “Don’t come, you guys. You ought to know that it would be pointless.”
Also, Goku got mad at Tenshinhan for fending of Stage 2 Cell, but had no objection to Tenshinhan coming to fight the Androids.
So, suppressed Piccolo, Kuririn, Tenshinhan, and Gohan should be enough to beat SSJ Vegeta.Chapter: 345 (DBZ 151), P14.7 wrote:Context: after seeing that Gohan, Tenshinhan, Piccolo, and Kuririn had followed him
No.20: “If I collect their energy and add it to my own, I’ll be able to win against Vegeta!”
So how strong are they?