I'd imagine that any scriptures that discribe Christ as King of kings or Lord of lords is easily ignored by the Watchtower as is the scripture that says you are to honor the Son same as the Father,[sorry, forget which one].
I remember that John 8:58 is the scripture in which Jesus declares his Divinity 'Amen, amen, I say to you, before Abraham came to be, I AM.'
Sure, my brother [and any other good witness], would answer the 'I have been' is in perfect tense. As a matter of fact, he constantly tells me that Jesus never said he was God, that he knew who he was.
I answer that he was, he is and he will be the same..always. That's why the Jews wanted to kill him. 'I have been' may have sounded strange, but not worthy of stoning to death, right?
dc