This is a tough one. I know 17 says that 18 wouldn't be able to handle Vegeta, Trunks, Piccolo and the humans together, but I don't really agree. SSJ Trunks was 2 shotted by 17 and 18. Vegeta had his arm broken the moment his stamina began to wear down.. I don't see how adding Goku would change anything here. 18 already said she had nothing to worry about when Vegeta said he was stronger than Goku, so I can't see them possessing the power to overcome her android body - especially when she can use a barrier to defend against a Shunkan Ido KHH. 18 should pulverize all 3 of them imo.