Break down of Arcade mode scoring system
Woo... Highest ranked Mitsurugi on the arcade leaderboards (55).
Anyway, for those who can't get the Astaroth method to work, try using any character you're comfortable with and doing more unblockable attacks.
With Mitsurugi, every unblockable attack I land I get 1000, if I manage to charge it long enough and land a 2 hit unblockable combo, I get another 1500. So I can actually milk out 4000-1000 per round, 8000-20000 per battle.
For those that are still having trouble calculating how many points you need:
Stage 1 (75200) [27 seconds, 2 Perfects, No blocking which means positive Soul Gauge]
Stage Clear Bonus - 2500
Health Bonus - 20000
Soul Gauge Bonus - 3500
Time Bonus - 6000
Perfect - 30000
Various Match Bonuses not displayed in Stage Result - 13200
Stage 7 (85250) [50 seconds, 1 Perfects, Blocking]
Stage Clear Bonus - 2500
Health Bonus - 18000
Soul Gauge Bonus - 3200
Time Bonus - 4000
Perfect - 15000
Consecutive win Bonus - 32000
Various Match Bonuses not displayed in Stage Result - 11550
Stage 8 (124220) [1 Perfect, Blocking]
The Consecutive win bonus really makes the difference in the end with a total of 127k. So assuming you never lose a round entirely (Losing a round and throwing the fight to retry will void all Consecutive win bonuses):
Stage 1 - No Consecutive Win Bonus
Stage 2 - 1000
Stage 3 - 2000
Stage 4 - 4000
Stage 5 - 8000
Stage 6 - 16000
Stage 7 - 32000
Stage 8 - 64000
Various bonuses:
Soul Gauge bonuses - 1500 to 3500
Time Bonus - 3000 to 8000
First Hit Bonus - 1000
Perfect - 15000
Health Bonus - 100 to 10000
"X" hit combo - Depends on damage and number
Unblockable attack - 1000
Wall hit - 1000
Last Attack - Depends on damage
Ukemi - 100
Impact - I don't know
Overkill - 100