But left side pieces. Weapon first, chest, pants > then the rest. Belt last. Make sure you watch accuracy. Sub stats are irrelevant at this point until horizontal progression sets are introduced, which will be in 3.1. But also remember the 200 pieces from void ark will not be upgradable like the eso pieces and if the trend of main stat increases between sets continues they won't be better than the upgraded eso pieces no matter what the secondary stats are because the weight of main stats has increased substantially vs the seconday counter parts.

TL;DR buy eso left side, weapon first, it's upgradable.