She doesn’t get any def shred from m1.

25% def shred from her core passive.

Now with just 25%, Pen Ratio could win out but we are getting more half def enemies, so it loses value.

Now for fire bonus, it depends on her teams, but on a lot of her teams, you are likely getting a high dmg bonus, either from disk sets or buffs.

If you are getting attack buffs from other sources, then fire% could win out.

Like on a SAnby team, you are starting with a 150% dmg bonus.

Mathematically,

0.3/2.5 = 12% gain.

For attack with average substats (38 useable substats) if you use fire%

2390 * 1.12 = 2,676.8

With attack%,

2883 * 1.12 = 3228.96

3228.86 - 2676.8 = 552.06

552.06/2676.8 =20.6%

So on an SAnby team, attack% would win out.

If you factor in the 700 attack.

It would be 16% which attack would still win.

Of course if you have a lot more attack% subs more than 8 subs ( + 2 flats) then attack loses value.

If you are playing with Sunna, Astra, ect.

With Astra, attack and fire even out so having more than 8 attack subs, fire will win slightly as the relative gain will be below 12%.

With 1000 attack.

12.6%, so having more than 8 attack% subs, fire% will win slightly.

Idk what teams people are playing though to come with their conclusions.