hi x
well there is diffrent ways to lower ohms , but a general rule is the thicker the wire the less ohms per meter. i.e if you are useing the same thing/like screwdriver to wrap coils on then 5 wraps of 0.2 mm wire will be hire resitsance than 5 wraps of 0.32 , so a thicker wire will lower ohms x or you could wrap your coil around something thinner , or do less wraps of wire x
hope that helps x