I like archangel more as it's a 7/7 creature that can heal, which does become useful in situations and if not it's still a high attack creature, and as you know I love my adrenaline. Right now I have 2 adrenalines in my deck and not a single life creature as I feel the bonus from adrenaline is better. My momentum serves a couple purposes, one being it can make a 6attk creature (flesh recluses and abyss) into a 7attk creature(for adrenaline), and the other being it gets through shields (and that combination with adrenaline is quite killer) which is even more important to me as I don't have Unstable Gases in my deck anymore as I now have wings so RoL/Hope decks can get annoying sometimes.
As for my weapon I like using discord. I find it so incredibly helpful to stop a mono, duo, or trio deck in its tracks with 1 single card. And out of all the weapons if discord gets stolen it doesn't hurt you all that much as random quanta isn't usually bad at all. And I agree about using adrenaline on destroyer, I never do it unless I have absolutely nothing else and it's late in the game or really early. As the destroyer pumps up the boost from adrenaline isn't all that great. As for antimatter I find that it isn't all that expensive earlymid-mid game once you get some towers out. It doesn't just function as great creature control to negate the damage but it converts that damage to healing(obviously). If you play antimatter on a shrieker thats +10health extra a turn because it's not dealing the damage anymore and another +10health a turn because of the healing for a 20point swing in the game which is massive! The other great ability to having it is if somebody plays antimatter on one of my adrenalined and momentumed creatures I can undo that.
But really, as I said, speed rainbow is the most customizable deck out of any of them. Each player has it slightly different to work with their own play style.