hashcat-4.0.1 mask

[testerro2]

Hi,

I have read
https://hashcat.net/wiki/doku.php?id=mask_attack

I'm using hashcat-4.0.1
hashcat64.exe -m 2500 -a 3 --increment --increment-min 8 --increment-max 8 xxx.hccapx
-1 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
 ?1?1?1?1?1?1?1?1

with 2 RX570 cards its about (22 years, 336 days) !!!

the password is always 8 characters long, but I trust they are always there
3 capital letters
3 lowercase letters
2 digits

is it possible to narrow the method down to the above findings
what tools to use, or rules can do it?

thank you in advance for the hint, tips,

Regards, Tadziu