At no point in the game should a whm be left freecasting sleep, if he runs over and sleeps you behind LoS, your team has to punish him for doing so or you are already playing from behind. If your comp doesnt have a blm and you are against a whm, the melee/tank should be training the whm the ENTIRE game, you should be surviving enemy burst provided they go for the CC> burst route and pump as much dps after surviving the enemy teams initial cds creating pressure that is bio/bioII/miasma+ranged dps, unhealable from a WHM perspective if his teammates dont purify.

Of course theres a ton of room for outplay between these hypotheticals, but to say that because whm's have sleep and fluid aura they are "by far the most useful class of the two" kinda shows that you either only soloqueue and get stomped repeatedly by 3man farm groups, or you've never played your class to full potential.

tl;dr

you are using 4 pieces of pve over i70 pvp, you have no resist materia, you are using +30mind

no.