There is nothing here that indicates or teaches that angels were prayed to, or even knew all the contents of the golden censer. The offering up of incense was an O.T. ordinance, and in Rev. 8:3,4 it appears to be a memorial unto God, and does not signify that the prayers needed an angelic postal service, much less heavenly secretaries, nor do the finite saints under the altar inquiring about the day of judgment (Rev. 6:9,10) support the Roman Catholic position.
It is time for Catholics to cease supposing that since angels serve God, and even if departed saints have some function in glory, then this supports praying to them, for this has no support, and instead what is abundantly supported and uniquely exampled is prayer directly to God.
Yes, but "we are surrounded by a great cloud of witnesses". Praying to is different than asking someone to pray with you.