What i think is everyone claims to know everything in this game but in fact don’t. There are no optimal build to the game, since it’s being updated too and something gets uped/nerfed from time to time. I always do my build with what i want to do. And you know what? It works greatly, so stop sometimes to hear everything out from others and do what you want. And even if your build feel somewhat a letdown right now it may be uped later, or get some hidden combos with next classes.
And remember that right now there is some OP combos for some classes like for example the ice shards. But they are already getting nerfed in korea ^^ And it is a burst phase that will work once and have a cooldown of one minute after that. ( 3min cooldown if you want the full burst with rune caster )
Sometimes don’t underrate low class buffs attributes; For example on my cataphract-dragoon that did almost all the dps at sometime with most of the parties once i was cataphract (so at rank 4). I felt like my dps was dropping again and again. Just by maxing attributs of concentrate/gung ho my dps is back to the honnorable dps it was. (even if with other ranks 7, it’s not as it was at that time and i’m no longer the greatest dps or maybe just by a little sometimes, but i’m on equal ground with every other dps ^^)