I would suggest two witnesses. The law and the prophets typified by Moses used to represent the letter of the law that kills. Together with prophets. Typified by Elijah. The power of the unseen gospel. The law of faith that heals and creates anew. Two laws working as one perfect (sola scriptura) or all things written in the law and prophets .
It would seem they are made to no effect or killed as in "no faith" for a period of time. Both witnesses are shown as
prophecy that which declares the gospel
Revelation 11:3 And I will give power unto my two witnesses, and they shall prophesy a thousand two hundred and threescore days, clothed in sackcloth.
In another way it can be two or three witnesses . The number it takes to make up a sect or a family. Two or three walking in agreement to one authority of the gospel .
Water and blood two common metaphors together represent the work of the Spirit that works in us to both will and perform his good pleasure
1 John 5:8 And there are three that bear witness in earth, the Spirit, and the water, and the blood: and these three agree in one.