can we have 2nd raise ability via item ?

[SirOleas]

I used the tonic before. It's very useful. Save MP, save time for casting raise skill The bad part is I can only own a tonic in my inventory, and I cant buy more. Correct me if I am wrong

You're correct. One at a time, maximum of 8 if all party members purchase one.
In other words....you still have to not suck!
lol xD