I typically run sin jacket (highest dmg stat) and use the inferno shield (defensive/reflect + it lasts a long time). If I'm going expensive, then specter hood + hellion jacket.Want inbetween? Go leather. Your chest slot ability will have no synergy with your mid-ranged abilities since most of your kit is about kiting and staying mid-range. Most chest slot abilities put you in the middle of battle (with the exception of Hunter Jacket, which is OK at best)
Soldier armor can work well with heron against newb gank groups that stack up and eat a FoS after the stun.
merc jacket pike is a niche synergy but forces you to run forest of spears to proc quickly enough.
i havent tested tenacity but I assume that would be OK.
soldier armor is OK but cheesy and easily countered by experienced players.