You don't get to dual wield at lvl19.
So either go for twisted chanter's staff, or dignified headmaster's charge. Unless you want flat stamina, then go balanced heartseeker + furbolg pouch.
Gun/bow is for you to choose, but ppl generally go for the bow since it grants hit rating. When you're playing troll, you get +1% crit chance when using a bow, as far as I remember, so you should take the bow.
Again, resilience gear is optional and up to you to choose. The more gear sets you have, the more situations you can adapt to. Grab inherited insignia of your faction, as it is clearly superior to standard pvp trinket.