40 atk, 40 str, 45 ranged, 1 def, 42 hits so far. where should i train str

I suggest from 40 - 45 strength at goblins/barbarians. Once you hit 45, go from 45 - 55 at minotaurs. At 55 - 80 you can do fresh crawlers, unless you want from 55 - 60 at zombies (At the edgeville area).