Oracle TANK TANK

Had this idea when I saw Milk but I didn't realize OTT was still so short on support that it would actually work:

1 - Little Witch LuLu
8/4/4, Crit/Draw/Heal

4 - Chocolat PG
4 - Gemini 8k
4 - Battle Sister Vanilla (+5k shield when on G)
2 - Weather Girl Milk (vanguard booster) / Battle Sister Cocoa (divination)

4 - Oracle Guardian Wiseman 10k
4 - Silent Tom
3 - Security Guardian (S-intercept)

4 - CEO
4 - Apollon

Deck is very straightforward. Ride CEO to use Divination, increasing trigger check chance to 75% per twin drive.
Use Gemini with Silent Tom to get those triggers on himself
Use Vanilla behind Wiseman or Apollon. Additionally, use her to guard like an S-Intercept
Use Milk behind CEO or put in Cocoa for more 10k action
Use Gemini with Security Guardian for tanky guarding like Vanilla
Attack with Apollon after CEO so you don't screw up your divination

Deck has a nice balance of consistency (triggers), offense (tom), plussing, and guarding. Seems to work about as well as Tachikaze.

It can also be switched up to be more about Division using different modes:

• Mode 1 (Divination) - Uses Divination as the core concept of the deck and therefore runs extra Battle Sister Cocoa for more of that skill. Each Divination makes the chance of your Twin Drive into 75% for that Battle Phase which is like a triple check (it's basically the whole reasoning behind the Monty Hall problem). This will not stack with itself so be careful not to use Cocoa and CEO together unless the first check was not a trigger. Though, if the second one (using Cocoa) is not a trigger, you've just done the equivalent of set up quadra-check!
  
• Mode 2 (Tank) - Uses tanky guarding as the core concept of the deck and therefore runs Battle Sister Vanilla who becomes 10k shield when guarding and the Security Guardian who becomes 10k shield when intercepting. There isn't much to say here except that this works extremely well for prolonging the game such that CEO Amaterasu can Divine more triggers on average and therefore you will be even against an opponent who is checking them like mad. As the game is prolonged and the average trigger check curve for the opponent smooths out, but yours keeps increasing, it tends to be the case that you win.

How early into the game does Vanilla's skill become active, on average, given you're clearing three cards from the soul to begin with if you use Lulu?

Without knowing that I'd instinctively either call swapping Vanilla for Circle Magus and just going full-on Divination, or swapping starters to the Tsukuline (with Wiseman being traded out for G2 Tsukuyomi. Ridiculously expensive and over the top, but the 9k vanilla vs. 10k shouldn't be a problem if this is for cross-less meta). Or just Wiseman traded out for Red-Eye to add a little extra consistency or something.

I can see how between Ammy and Bird you might be getting enough to make it worth it though.

Late in the game for Vanilla. But Circle Magus does exactly nothing. It's just a skill you put in because you need a 7k vanilla. In any case, you can always use the G3 searcher. It might be a -1 sometimes but it can increase CEO consistency as well as get the soul you need (and is about the only time I'd suggest a card like this). In any case, this is the exact reason why the updated OTT article (slightly overhauled) uses mode 1 Divination as the default. Because with Vanilla you usually have to wait quite a while. 6 turns actually unless you want to swap Wisemans for Oracle Guardian Red Eye and hope he hits once or twice or if you get rid of Psychic Birds but that goes against the idea of tank. But it's about investment if you have more Vanillas still.