level one, you never really get stats. at level 2, it depends on your lane and hero. For example, hammertorm (sven), his stun is obviously going to be your first skill. His other 2 skills don't really help at such an early stage of the game. Armor aura gives armor, but basically says that your creeps will be harder to kill, thus making the creep line go to the enemy tower. Splash damage doesn't help with such a low attack and its a waste until later.