I hunted 400 Crimson Wood for an Arcanon a while ago, and my estimation is around 5~15 wood per channel cycle, sometimes you get only 3 wood from 19 channels (95 trees), sometimes you get 3 wood out of 5 trees in one channel..
I didn't bother using 2x/4x drop so it took a while. If I had been steadily hunting, it would've taken around 1 whole month, but since I gave it up at around 3xx wood for a period of time, it took muchhhhhh longer, but yea, 1 month considering my patience/time.
EDIT: You can keep cycling channels but each cycle has to have about a 10 minute break, which gets you very tempted to call it a day..
I didn't bother using 2x/4x drop so it took a while. If I had been steadily hunting, it would've taken around 1 whole month, but since I gave it up at around 3xx wood for a period of time, it took muchhhhhh longer, but yea, 1 month considering my patience/time.
EDIT: You can keep cycling channels but each cycle has to have about a 10 minute break, which gets you very tempted to call it a day..