I am not sure did I understand correctly.
When I play elf, I usually harras with demon hunter and in meantime I am buliding archers at home. When my dh ( demon hunter ) will be on low hp, I am going home, healling and creeping. When I am in tr2, I buy some hero from the tavern and I am attacking my oponent. While I am doing that, I am buliding 2x Ancient of lore at home, and I am going to tr3. Even if you lose when you attack your oponent, that's ok. Cuz you are attacking him only to destruct his attention ( only with 4-5 archers and 2 heroes ). You mustn't lose a hero or tp. Let your archers die if its needed, cuz when you make claws, they wont need you. After that go home, heal urself. Creep few spots with the claws, and attack your oponent. You will win