doom is pretty useless unless maxed. i mean it. think this. some taurospears are attacking u. u need to save ur life. i dunno why u are in a mob of taurospears, but hey, i dun care. anyway, u try doom. they turn into cute snails. u happily use shining ray on them. then suddenly, they turn back into mean taurospears, and u get ur ass kicked.
dispel isnt the greatest skill either. not many things can give u some stupid status, and then, u can also use tonics, or antidotes, or **** like that. and u wont be killing those monsters much either.
so, i think doom ought to get maxed. dispel just isnt helpful unless ur at zakum or against some boss that curses you.