I have played ninja and can say that yes the cicada and tatami need a delay, their damage is hella good for the fact that they don't have that much HP(which can be looked at once the cicada and tatami are delayed). The kunai hit for between 9 and 15k per hit x3 makes it a rather strong skill since it can be spammed while in the cover of cicada and tatami. The class as it stands is broken and so a 2 second delay on tatami and cicada along with a slight HP boost wouldn't hurt the class, you ninja are having the problem with tanking because you're using 2 tao gunka along with GTB and you wonder why you drop like flies. As far as the int ninja, it's your own fault that you're dying and can't carry the stones, you need to fix your build, although unlimited stones can be looked at AFTER the tatami and cicada have been dealt with.