Crimson Wood

Dedication indeed. So far I only have about 15 pieces of Crimson Wood; it's a start, but it's still time-consuming. I've also been nabbing all the pieces of Crimson Wood being sold in the FM (as long as it isn't ridiculously high in price).

But I want that bow. >.o What are the trees' respawn time? I know it certainly isn't instantly.

It''s in the neighborhood of 15 minutes. Typically, by the time I got done with all 19 Lower Ascent channels, I'd have to wait 5-10 minutes for the trees to start spawning again. If you switch between the two maps (Though you have to be quite a bit stronger to farm the trees at Strength since they spawn with Elders and Nightshadows) then you can do it more or less nonstop. Also, as you pass through lower ascent channels, try asking the people there to hold on to any crimson wood if you find it. Since most of the people training there are archers, they can appreciate your task and I have found that most people are happy to share and help you on your goal. Many of them specifically requested I come back and show them the bow when I finished, and I kept track of their names and did just that.