The only way to play volcanic in this meta:
Destroy your enemies' board as much and often as possible! Torrential and Reload for as much boardwipe as you want.
You also play some of the Volcanic Staples because they are good and work well with the deck.
Extravagance because the extra deck really is not that important.
"But OP why do you play Ntss when nothing can proc it ??????"
Basically its 2 flex spots for the Marrilla and the Ntss:
If you play 2 Marrilla you dont play the Ntss. But if you think that 7 Reloads is a bit too much you can throw the Marrillas out for 2 Dogmatika Punishment and have more removal.
I hope this is a bit helpful and you are inspired to try out Volcanics again.
PS: Konami pls give us a good pyro archtype :(