What is the high tier grade weapon?

[AgilityWiz 10]

What is the high tier grade weapon? ruud Manticore or MUX Weapon.

Mastery weapon tiers

Dark Angel -> Holy Angel -> Soul -> Blue Eye -> Silver Heart -> Manticore

MUX Weapon will be higher for 1 tier. More information about changes in weapons will be available later

[Beasty 288]

Well as I understand it, the new Manticore weapon will take mux weapon place and mux weapon will be 1 tier higher meaning that it will still be the best weapon.

I believe mux is now tier 7 if we compare to lottery ruud weapons (dark angel being the tier 1), so Manticore probably will be tier 7 and mux weapon will become tier 8.

[Arturs 1,295]

Mastery weapons will take a place from tier 1 to tier 6. 
Each new season, the new mastery weapon will take tier 6 place. 
MUX Legend weapons will be always tier 7. In the future, we will add new MUX weapons, and they will take tier 8 place. 

Of course, we can just add a new tier any time, when a new weapon appears in-game. But we already have 7 tiers in season 17. And we can't with each new tier upping the damage on the weapons, it already has very high numbers.