There are two sets accessible through influence - one set of gear is lv12-13ish, the other one is lv18-19ish. Same goes for t3 influence - one set is like lv22-23ish, the other one lv27-28ish.
With the latter not being at all relevant for debolstering anymore since the merger of the tiers - and back on live these optional sets have never been remotely relevant, considering most of the influence gear was BiS in its lvx8-x9ish iteration in its respective tier.
Abbd.: This gear offers more armor than the Harrier stuff available - before anyone points out the stats, I just randomly hover'd about an influence reward. I am sure there are items, for certain classes, that will yield better stats than the Harrier gear and have yet better armor.
Abbd.: Just checked my initial observation (in regards to PvE influence stuff lv12 and bla), seems to be fixed by now.
E: Words and stuff.