>>527304263
If you run
2 piece woodpecker
4 piece king of summit
Disc 4 ATK
Disc 5 ATK
Disc 6 Impact
You need 6 Crit Rate +1 sub stacks. So you just need to roll +1 on 5 out of six pieces.
You will also need to roll 4 +1 ATK% sub stats with some flat ATK here and there which is more difficult because you have 2 atk% discs that can't roll atk% substats but not as bad as you're making out.
But you need to run Koleda or Lycaons wengine. Preferably Koleda's because it gives good off field energy regen.
With the free standard wengine this is very doable.
Not hard to hit these breakpoints at all.
With a high ATK A rank piece like Pulchra or Anby's engine, you'll need to hit 2 more atk% substats and or mix in some flat atk substats elsewhere which becomes more difficult.
Obviously you can just not run Impact and slot in ATK on disc 6 with crit rate on disc 4 while you're farming better substats.