Imho, min max makes is quite important. You can not max everything, so you have to make choices which stat should be maxed, which can be dumped and which is ok with medium points.
Example my monk:
max MIG: Damage and healing - Maybe the best stat for a a tank with dps.
medium CON: Nice to have high but medium is ok if points are needed for other stats.
min:DEX because with torments reach she mostly attacks "full rounds"
max PER -> max ACC. Quite important
INT: Do you uses spells/Abilities/Scrolls/potions etc which need a long duration (then max INT)? or not (dump it!)
RES: Not that essential but have an eye on concentration (medium RES is ok)