well as i was playing my emu, i kept thinking...oh no berserker....i hope i dont die......i wanted to keep my record! anyway as i was down to my last character (vahn) and my ap low as the the the the i was thinking...."well i ran out on phoenixes.... not surprise since i never use them.... my last hope to keep using nighto and heal while hes confused...." and throughout the whole battle i used nighto 5-10 times... and then i decided that if he doesn't die at this point i quit... then (after keeping the berserker at 600-hp or so) i used nighto one last time.... and it annihilated him.... so....i 4got what i was getting to....

oh yeah.... then that means that nighto does do some damage of its own.... but wether or not it'll kill it is up to you weakening it first... and something else that was important....oh well
Edit:
Not even gonna bother fixing that horrible post above this.
Just know, this is now a general thread, so talk about any theories/experiences that have suited you in combat.