trouble with tonberry in Ipsen's castle

[unfinished fantasy]

Hey how do you kill 3 tonberrys fast enough in Ipsen's castle before each of them knocks out random party member with 9999 knife and disappears shortly afterwards? Or defeating them is pointless and I should flee instead?

- update - I forgot to try thievery skill! (I was surprised to see that Steiner ability "shock" did very little damage against Tonberry and so didn't try out other party members skills)

[Vivisteiner]

^You dont really get much though, do you. :(

[Quindiana Jones]

What weapons are you using? Don't forget to go right down to the original crappy weapons in Ipsen's Castle. It's all topsy turvy. :(

[unfinished fantasy]

What weapons are you using? Don't forget to go right down to the original crappy weapons in Ipsen's Castle. It's all topsy turvy. :(I figured out this then I opened the treasure chest with dagger inside. However I couldn't kill them fast enough still. Anyway it appears Zidane's skill thievery does the job well.