Since you don't know what class you will be maining until you find a static. Hold off on the weapon (until you know for sure). From there, it comes down to what you want to build your tank as. More of a dps tank (WAR usually) or more of a mitigation tank (PLD usually).

A more dps spec is as follows: POE Head, Dread Body, Dread Gloves, POE Belt, Dread Legs, POE Boots.
A more mitigation spec is as follows: Dread Helm, POE Body, POE Gloves, Dread Belt, POE Legs, Dread Boots.

NOTE: Both of these builds require some ACC on the weapon usually (no melded acc's) to hit t13 ACC cap

After that its about Accessories, If you go WAR you would probably want to invest in the i110 crafted pieces and meld STR or VIT depending on which ones you make. PLD can work just as well with the i110 pieces but usually less expected to have them. A mix of i130 STR or VIT is ok for both classes as well.