Hi everyone, I'm Tiger, and this is my FIRST guide ever. I worked hard to make this mini guide the best I could, and I would appreciate all feedback. I'd like to apology my english skills, I am not the most talented one.
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Heimerdinger is a fantastic champion, and he is by far the most underrated, but, this mastermind is truly on his best on aram. So make yourself comfy and get ready for my small sight-seeing tour on Heimerdinger's awesomeness!

Pros + Easy to Play + Extremely Powerful Turrets + Amazing Damage Boost with UPGRADE!!! + Slow + Good Farming Means Good Money + Can Stay at the Back And Let the Turrets Do the Work! + Hextech Micro-Rockets Make You KS After KS + Techmaturgical Repair Bots + Can play to victory just by using Starting Items

Cons - Squishy - Unbelievable Slow - No escapes - Easy to counter - You Need to Stay on Your Toes - Extremely Mana Hungry - Turrets Can Be Onehitted

Greater Mark of Magic Penetration, Greater Seal of Armor, Greater Glyph of Magic Resist are all standard runes. No need no discuss about these.
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But, how about Greater Quintessence of Mana Regeneration? Simply? Heimerdinger is so mana hungry, he could eat mana all day every day! You seriously need it to stay alive. These runes come extremely important in that point of game, when you are doing for example 9/0/12, and still using your starting build. You just want to finish the game but without mana, it is desperate try.

As said before, stay on your toes. Unfortunatelly Heimerdinger is so squishy that he can be brought down with ease. Luckily there is a weapon against that, your ice-spitting turrets! Place your turrets to bushes or in the middle of the lane. When the enemy team is on a chace, use your ult and they crash to wall of ice! In this point, make the first move, face the enemy team with CH-1 CONCUSSION GRENADE. When you do this, you quickly find out that your own team is facing the enemy too. You get atleast assists thanks to turrets or even better, you get the famous Kill Secures using Hextech Micro-Rockets! And it gets even better, Techmaturgical Repair Bots is a really useful tool in ARAM, why? Because you are the healer, stay close to player with low health, increase their healt and receive honor! Well, maybe your team is not aware of your passive, but, atleast you are and it helps you and your turrets! (Yes, you can heal turrets with your passive)

Summing up, Heimerdinger is an extremely fun champion to play and you can play with ease.
If you have any comments, questions or anything on your mind, please do ask.
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Upvote if you liked the guide, and downvote if you feel that my guide is full of "you-know-what". If you do downvote, please tell me why, and I can continue the progress to make this guide even better! Ofcourse, if you feel that your set of runes or masteries is better than mine, please let me know! I want nothing but to become better and better, and hopefully, so do you!
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Just because this is a "mini guide" doesn't mean that ok, I'll check runes, masteries and items lets go! No, no, no. You need to focus on the gameplay section, you need to know who you are playing, by that route, you can become awesome!

Happy Kill Securing!

- Tiger