Please correct me if I'm wrong, because I dun have these yet.
This is just my rough calculation :
- HSR Metatron Lvl 60 - 9000 atk,
> lvl 1 skill - 250% - can deal about 30k
> lvl 10 skill - 350% - can deal about 40k
- SR Arianrhod Lvl 50 - 6500 atk
> lvl 1 skill - 250% - can deal about 20k
> lvl 10 skill - 350% - can deal about 30k
These are raw dmg, might be +/- due to AW's defend and 'swing' dmg...
Uriel + Polaris = 3x * 3x on top of those damages...Â

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Max skill HSR Meta would deal about 40k*9 (due to 3x times 3x) = 360k per skill dmg
Max skill SR Ary would deal about 30k*9 = 270k per skill dmg
the rest...about proc chance rate..its up to you, which one you feel betterÂ
oh, and of coz HSR Meta would have better HPÂ

I remember trying to use my HSR max lvl Metatron on AW fight, skill proc only dmg 10k+....
edit: yep, just tried it.... 13k dmg only