To get 1k+: Generally, just level up your wood production enough to be able to get into the higher level environment upgrades, which are then self-propagating. Some micro: 1) if you stagger your lumberdwarf creation so that each dwarf is able to exhaust his energy and return home, then the yield per lumberdwarf run will be higher (as opposed to letting them stack in a clump that clears from start to end one time, but then has a long cd), since ld only cuts on his egress trip; 2) Do the math so that your lds only need to strokes to cut a tree, generally upgrading ld ability before tree ability.
I got 1157 in 10:43 by going [tree, lumber, fisher, gatherer, house, environment, dragon]: -> [(1/1), (1/1), (0/0), (1/0), (1), (0), (0)] and ending with [(6/7), (6/7), (3/4), (4/5), (8), (10), (1)].