Here’s my reharmonization of Mighty to Save.

Here are the chords:

Verse:

Dmaj7, Amaj7, F#m7, E (repeat)

Bm7 C#m7, Dmaj7,

Chorus:

A, C#m7, Bm7, Amaj7, F#m7, Gmaj7 (repeat)

Bridge:

Dmaj7, C#m7, Bm7, C#m7 (repeat)

 Enjoy!