Hmmm... I have good style to master some of the sub-weapons in Portrait of Ruin.
In Dark Academy there is room near boss room (in that room is 4 Ghouls and Vapula)
G G V G G
G=Ghoul
V=Vapula
Kill Vapula and count how many times you have to hit Vapula to kill him (example: 5 times), exit and come back to room and this time hit vapula 4 times (if you follow example) and finish him with sub-weapon. Vapula is easy to kill and you get 12 Sp's when you kill him and there is save statue near, so it's easy to fill up your Mp (i used this way to master some of the sub-weapons)
In Dark Academy there is room near boss room (in that room is 4 Ghouls and Vapula)
G=Ghoul
V=Vapula
Kill Vapula and count how many times you have to hit Vapula to kill him (example: 5 times), exit and come back to room and this time hit vapula 4 times (if you follow example) and finish him with sub-weapon. Vapula is easy to kill and you get 12 Sp's when you kill him and there is save statue near, so it's easy to fill up your Mp (i used this way to master some of the sub-weapons)






