My main weapon set was usually standard Shadow Bow, Shadow Sniper, Ropercaster, and one of the 2 types of Slings depending on the situation. For elemental I found that Sling could apply it faster than the War Bow, even when nocking the extra arrows. When hunting big game I would use the standard Sling for applying status effect, and use the Blast Sling when running mission with a lot of people. When bandits/raiders are moving in on you head shots start to get hard to pull off when you concentration is used up, but with the Blast Sling modded for pure damage I could take out just about any human with a single sticky bomb, no head shot required. Sometimes I would land a sticky bomb and they would run for cover by a friend and I would take both out.
I didn't care for the Rattler either, when up close I prefer the staff, it has a few over powered combos. You can take out whole camps without being seen using the Lure Call + Stealth Attack combo, it's obsene how well this works. Then mid/late game as had taken all of the staff damage output skills I could. Then another great combo is the one that heavy strikes almost always knock down enemies which opens them up to Crit Strike. When taking on some of the bigger robots like Stalker I could Lure Call + Silent Strike for huge opening damage, then wait for them to get up, Heavy Strike for a 1 hit knock down + Critical Strike for another huge chunk of damage. This would kill a mojority of enemies, robo or human, and if it didn't just wait for them to get back up for another Heavy Strike knock down + Crit Strike. This was so effective at points I almost stopped using my bow for most situations.
Didn't bother much with the Tripcaster. Seemed like to much battle prep to get into a fight, I was more bull headed with my approach. Even for big game that the staff combos wouldn't be effective on, I prefered the Ropecaster/Sling combo.
As for armor(pre Shield Weaver) I used the Heavy Nora Protector for a lot, and had the stealth set when I wanted to play extra sneaky.