I only played one game with a Heimer that was used to his full potential and i gotta say, i was crying. His turrets are some what manageable at first, however the real threat is his CH-1 Concussion Grenade which can easily stun you if your Lunar Rush to iniate. On top of that when he UPGRADE!!! The combination of the slow, and the passive armor reduction from the turrets, make him dangerous for Diana. Another thing to point out is the lack of CS Diana will receive against a Heimer. The average Heimer play style is to push lanes. After level six this becomes Diana's main goal; allowing diana to take Jungle Creeps and even gank here and there. Sadly Against a Heimer thats a no go, he can push a lot harder than you can at a very far range and thus requiring you to stay in your lane in fear of losing your turret to early.