>>537821138
Goten and Trunks are both mastered Super Saiyans. They are both able to easily beat on 18 (while nerfed by the suit) prior to training. One blast from Trunks threatened to kill 18.
Piccolo has been training non stop since the end of the cell games. He's for sure stronger than he was. He's in-between his old level (equal to A17) and Cell's level. On the higher end of that he'd be stronger than Goten and Trunks on their own but weaker than Dabura which perfectly fits with what's shown.
>since they were only measured to 18 and Piccolo
They were measured up to Buu Gohan which is a pretty good feat.
>In DBS' manga they do seem to be crazy strong though, since they were defending themselves against 7 Cell Jrs, and that's nuts
I mean kinda. If you think those cell jrs are stronger than the cell games ones. Otherwise that's a sub SS2 Gohan feat. Not very impressive considering 6 years had passed since Buu. As teens they have a very good performance against Cell Max and a decent one against SS1 Gohan.
I think I exaggerated a little. If they were kid Gohan pre anger amp level they'd be able to beat Buu Gohan which they weren't able to since he's weaker than he was as a kid. They're closer to Cell Goku level. Definitely above Cell Bejita.