actually cannot solo, if the target realizes how stupid the idea is (Lets say, Danzō makes the target commit suicide with KA) they won't do it. Mifune was broken out because he was notified that he was under a Genjutsu, which means that his brain overid KA (AKA, the idea that Danzō should be elected).
But if someone wants to argue against this. Then I will say that other counters are either making clones before hand, since they can't be put under Genjutsu, they snap you out. Be a Jinchuriki. Have a summon out before hand. Have the Rinnengan (It seemingly is very good at negating Genjutsu, IT is the most powerful Genjutsu, and a Rinnegan can negate it).