Where's the Scriptual evidence to back up your claim? I can't find any references to being filled with blood or of having Jesus' blood flowing through us.
The only passage I'm aware of which talks of drinking Jesus' blood is John 6, when Jesus said we should eat his flesh too:
47) Most certainly, I tell you, he who believes in me has eternal life.
48) I am the bread of life.
49) Your fathers ate the manna in the wilderness, and they died.
50) This is the bread which comes down out of heaven, that anyone may eat of it and not die.
51) I am the living bread which came down out of heaven. If anyone eats of this bread, he will live forever. Yes, the bread which I will give for the life of the world is my flesh.”
52) The Jews therefore contended with one another, saying, “How can this man give us his flesh to eat?”
53) Jesus therefore said to them, “Most certainly I tell you, unless you eat the flesh of the Son of Man and drink his blood, you don’t have life in yourselves.
54) He who eats my flesh and drinks my blood has eternal life, and I will raise him up at the last day.
55) For my flesh is food indeed, and my blood is drink indeed.
56) He who eats my flesh and drinks my blood lives in me, and I in him.
57) As the living Father sent me, and I live because of the Father; so he who feeds on me, he will also live because of me.
58) This is the bread which came down out of heaven—not as our fathers ate the manna, and died. He who eats this bread will live forever.”
59) He said these things in the synagogue, as he taught in Capernaum.
60) Therefore many of his disciples, when they heard this, said, “This is a hard saying! Who can listen to it?”
61) But Jesus knowing in himself that his disciples murmured at this, said to them, “Does this cause you to stumble?
62) Then what if you would see the Son of Man ascending to where he was before?
63) It is the spirit who gives life. The flesh profits nothing. The words that I speak to you are spirit, and are life.
64) But there are some of you who don’t believe.” For Jesus knew from the beginning who they were who didn’t believe, and who it was who would betray him.
65) He said, “For this cause I have said to you that no one can come to me, unless it is given to him by my Father.”
66) At this, many of his disciples went back, and walked no more with him.
Note that Jesus explains that his literal flesh (and blood) would be of no benefit to them. His body (and blood) he sacrificed "for the life of the world" (v. 51), i.e. all mankind (Jews, Christians and gentiles). He ws speaking metaphorically, saying that he was the bread of life which came down from heaven, the anti-typical manna. Then he plainly stated what he meant - "The words that I speak to you are spirit, and are life". In order to have eternal life, and for Jesus to resurrect us, we need to believe and absorb Jesus' teachings and commandments.
As priests we may symbolically sprinkle or plead the blood of Jesus - in word only, not literally! We are calling upon, or claiming, the merit of Jesus' sacrifice. Likewise, those believers living through the tribulation can be washed clean of their sins by the merit of Jesus' sacirfice, symbolically washing their robes his blood - it does not mean that they have been begotten again. All those resurrected in the second resurrection will likewise have their sins and unrighteousness symbolically covered by Jesus' blood, i.e. they are redeemed through the merit of Jesus' sacrifce of his life, just the same as Christians are.
If the drinking and washing of the blood is symbolic, then the blood is symbolic, and you cannot plead symbolic blood, except your pleading is symbolic.
"symbolically sprinkle or plead the blood of Jesus"
If the blood is symbolic and the pleading is symbolic, then the forgiveness is symbolic.
Symbolizing of Scripture, where Scripture is not symbolic, is nullifying Scripture, and the promises and assurances thereof are done away into symbolism only.
Traditions of men contrary to Scripture are the beginning of symbolizing and nullifying Scripture, because otherwise Scripture would nullify the teachings of men.
"Thus have ye made the commandment of God of none effect by your tradition."