I've been using mostly arrest, pacifism, or repentence, but condemn looks pretty good.
The question is difficult to answer without context. If you're looking to remove combat threats then Condemn is exactly what you want. You mentioned Arrest, however, which is quite a good card. It not only removes combat threats, but it also deactivates creatures with abilities that are causing your grief, which is something that white has trouble doing without Swords to Plowshares.