What Bible verse to use when? / WWY Q&A 52

When praying for healing or against spiritual oppression, do you have your 6 or so handy-dandy verses all ready bulleted as your spiritual weapon to use like Quick-Draw McGraw? Those verses that we've known faithfully since Sunday school classes as a child perhaps?

Is SPIRITUAL warfare that easy really? OR is it that you . . . I mean, are they just lacking faith to believe in those verses? or might those verses not be working for some other reason? But Yeshua used those verses and they worked for Him.

And Yeshua seldom did the same miracle the same way twice . . . why might that be.