To make mass amounts of boards, in the classic client, you can:
First, set up a macro to Last Object + Last Target
Second, use your axe on the logs (whether they are in a box or on the ground).
Third, pick up the logs with you cursor and just hold them.
Finally, use the macro from the fisrt step and the boards should fall to you feet.
This assumes that you have the required carpentry or lumberjacking skill to use/obtain the type of wood.
Edit: I know you asked about the EC, but I do not know if this also works in the EC.
I find that is easier to make boards as I gather them, since they changed the way you make boards. All that is required now is you use an axe on logs in your backpack. You no longer need to use a carpentry tool to make them.
Stayin Alive,
BG