It’s clear in that passage of Revelation those elders in heaven are offering prayers to God.
That doesn't appear anywhere in the bible so how do you say it's "clear"?
Rev 5:8 And when he had taken the book, the four beasts and four and twenty elders fell down before the Lamb, having every one of them harps, and golden vials full of odours, which are the prayers of saints.
The elders do hold the vials of prayers but they don't offer those prayers to God. It is however very clear who does that:
Rev 8:3 And another angel came and stood at the altar, having a golden censer; and there was given unto him much incense, that he should offer it with the prayers of all saints upon the golden altar which was before the throne.
Rev 8:4 And the smoke of the incense, which came with the prayers of the saints, ascended up before God out of the angel's hand.
It is an angel that offers the prayers to God, not the elders as you claimed.
Let me know if there is anything else I can correct for you.