I found timed nodes to be annoying to keep track of and chase. I just went and farmed the non-timed collectibles when I had the time and inclination. I hate being on someone else's schedule and bouncing from zone to zone. Thankfully you can gather collectibles from non-timed nodes, for as long and as often as you want, that are nearly as lucrative as far as xp goes (though admittedly they dont reward as many yellow scrips).