No it is never right to cheat, lie or trick others.
Re read the surmon on the mount in Matthew5, particularly
33 ‘Again, you have heard that it was said to the people long ago, “Do not break your oath, but fulfil to the Lord the oaths you have made.” **34 **But I tell you, do not swear an oath at all: either by heaven, for it is God’s throne; **35 **or by the earth, for it is his footstool; or by Jerusalem, for it is the city of the Great King. **36 **And do not swear by your head, for you cannot make even one hair white or black. **37 **All you need to say is simply “Yes,” or “No”; anything beyond this comes from the evil one.
Jesus is saying not only just to simply say ‘ yes or no’ but also to do what you have said you will do.
The ten commandments say do not lie, give walse witness, and if you follow Jesus’s interpretation of the law that means not doing all the coniving tricks you listed.