I almost have a BH chestpeice, and columni in the rest, would that be good enough for storymodes, or would i be over-geared?
Note, i have a matrix cube, a rakata implant alongside my columni implant, and the on-effect sheild boost relic, and a recruit earpiece. Should i get a different earpiece, or should that be enough with the rest of my gear to tank it successfully?
In any decent group your gear is sufficient for Story EV/KP. Story EC would be a bit too much, but as long as your group for Story EV/KP knows the mechanics of the fights and the basics of their class you'll be fine.
Make sure that your puzzle solvers actually know the puzzle though. You'd be surprised at how many decent players don't understand a basic Tower of Hanoi puzzle