Forget silent shot or heartcleave (or whatever ... don’t use the spells that require wood tipped arrows in inventory).
Rangers who know anything only use (and the names of these spells may not be the lvl 110 versions ...just look those up) marked shots, focused blizzard, dicho/dissident, summers, and our big DoT. If marked, focused, and dicho/diss are down, spam summers. Make your tank work for agro. Use the dot on named and longer fights... it’s a mana hog in the group game.
oh, and use a bow... unless you absolutely can’t.