[Coldsaturn]

It isn't guaranteed, but the rumored roadmap has been correct for the past 5 banners and hasn't missed even once. So if AS rerun happens it will be in november. The problem with reruns is that they're more expensive than new myth banners. You don't have any free pull, don't have rewards etc. It's just you pouring diamonds in until you get it. Lumiere was a little bloodbath, and if I had known back then that a few months later I would have gotten a yellow stellactrum DEF myth in the form of Sea God Rafayel, I wouldn't have pulled for Xav, to be honest.
Not to say that Lumiere isn't amazing, because he is, but at a certain point I had to start thinking in terms of the main LI I wanted to pour money on, because my current budget doesn't allow me more than that. And that's going to be Raf, so every other solo or myth banner will be skipped.
Sylus is the only one who will make me stop and possibly ruin my wallet. But it's Sylus, what did you expect. The real difficult choice will be between AS rerun or the new myth, because I'll probably be able to go for only one of the two. AS scales on HP, and I don't have that many protocores leveled for HP builds. If the new myth comes up as ATK or DEF then I might go in that direction since I'm already leveling both builds for Abysswalker (Atk) and Lumiere/Sea God (Def).

Your choice of only going for specific cards that you really really want to play yourself (+ battles) while you enjoy the rest on youtube is 100% a good strategic idea. Also watching the new cards on youtube even before you start pulling so you make informed choices. Some cards might not be worth it even if they're shiny and new.

Aw I hope I didn't pour a bucket of ice water on what enthusiasm you had for it! If it didn't cost purple diamonds I wouldn't even hesitate. It's the limited resources I have that's making me especially picky.