Yes, I use it alongside Giehretus as a combo and it has always worked really well for me.
Since you didn’t seem to like Coltraz’s explanation…
She’s much stronger when you have all mythics in your team because she’s tanky stun protection without much weakness. That’s a niche role she fills and disabling one enemy is something your strong team can capitalise on more than weaker teams. It’s a similar role to what Aethereon did for top teams in the past or Sakuralisk (back when there were fewer high damage attacks) and Emeraldont (if you want to go old school).
Simply put, she’s great as long as she gets a turn (which is likely) if you can rely on all your other monsters being strong and useful in the battle.
@Coltraz This is one I’m not sure I agree with. I am very high on XYZ myself, but find that most teams built by people with enormous collections use multiple stun counters. When playing XYZ you can usually handle a single stun counter but more than one and it tends to backfire. So I would say if you’re viewing through the lens of “we play with everything” then I’d be lower on XYZ.
Otherwise, looks like a great list and I will definitely refer to it regularly. I hope you manage to keep it up 
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Great work! 
please, introduce system S/A/B too.
no
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Thank you for including Majorie in the worst of the list 
I have personally used her on a few occasions, and while she is very fun to play with due to her playstyle, she is far from being something viable in PvP.
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Movements after update Ver. 2.58
Y Ddraig Goch
Old Tier: Dead Slots
New Tier: Niche Tools
Halved skill TU makes it worth adding to a team now.
• 42TU Defang and 25TU Heal help it stay active and secure kills
• Tyrannical Ruling now has two uses, boosting its threat level
• 68TU Piercing Blow feels much more usable
Overall, this mythic is now way more dangerous to face than before.
It still takes 59TU to use the sercet skill. Meanwhile, its opponent is Posion monster which is always very numerous and can have a turn immediately like Asomidia, making the whole team faster like Deathgarez. next is Astra with death immu. in short a good buff but doesn’t solve the current meta problem
Yeah. That’s why it moves just there and not higher.
embiame un monstruo mitico