Play it safe on the lane. Keep spamming those Napalm and try to get 6 stacks. You can get first blood even vs a tri lane.
Be careful of enemy stuns early game. Along with blinking heroes they can make your life miserable. If farming is going bad on your lane, do go and spam your firefly on the jungle, as you need to farm that Blink Dagger.
When you get your blink, just gank. And make sure to use your firefly-blink-lasso-forcestaff combo to get your team some easy kills.