When you are out in the lanes, you only get 2moons dil by landing the last hit or killing blow. Since you do not get experience until things actually die, you can generally just hang back and move in for the kill when possible just to strengthen your wallet. Being able to do this makes you a more solid player in general. This becomes vital when you are being harassed constantly.
There are several benefits for being able to do this. HoN is also extremely cruel in rubbing it in your face when a deny takes place to. The entire enemy team only gets half the rewarding 2moons gold. This actually prevents the team from receiving on average. You may only attack your own tower when it is beneath 10% HP. Being able to do both allows for a strong lane control game and gives you a huge advantage. Practice it. Even if you fail, at least you tried. However, do not put yourself in danger to deny or last hit. Dying is never worth anything. There are also certain abilities in the game that does an automatic deny for you.