I am also currently working through hellfire quests. So far, I have skipped all the ones that require actually picking up objects from the ground (zephlin parts, ravager eggs, flowers, etc). Some of the looting quests aren't that bad though. The one were you need 40 things from void ridge is not bad at all. Every mob drops at least one, and you can get up to 3 per kill.

For me, the goal is to get to 70 as quickly as possible. I'll take the easy gear upgrades, but I don't want to waste too much time with it. Most mobs my level take one or two sets of lightning bolts to kill anyway.