How to generic build a midlaner in a few easy steps

I've been playing a lot of games recently with people who don't know how to build (most upsetting of which was against a Luden's -> Athene's rush Ziggs), so I've decided to do a very generic run through for builds so people know what they need.

So here's how you build in a few easy steps.

Step 1: buy Doran's, Flask for Fizz, Mana Crystal for Ryze, Boots for Kat/Akali, and Long Sword or Doran's Blade for ADs.

Step 2: Assess the amount of gold you have on first back. This is super important.

Step 3: Your core item is your manalessness item. Manaless champions, Jayce, Azir, and Lissandra can skip this step. You want to start building this ASAP because it gives you the most kit cohesiveness and lane presence because 2 ~250 damage Q's are stronger than 10% CDR and 18 damage (0.6 AP ratio w/ a 30 AP item like Codex). This is items like Lost Chapter or Tear.

Step 4: Consider your defenses and how necessary they are vs. your opponent. Consider what would happen if you came back to lane with a Lost Chapter. Would their lane presence or dual lane presence (how oppressive would they be if the jungler ganked and/or tower dived). If they're too much of a threat, buy a defense item first.

Step 5: Don't finish Maw/Abyssal/Zhonya's unless you REALLY need to. Buy your strongest item. Youmuu's is amazing. Morellonomicon is amazing. Rylai's (only on Viktor and Cassiopeia rushes) are amazing.

Step 6: Finish your defense item now. The extra CDR/armor pen is worth it now that you won't go OOM trying to abuse it.

Step 7: If you can use it, and you like drawn out fights, get yourself a Rylai's.

Step 8: Round out your build with your main damage items unless you get into a really odd super situational spot (needing Zhonya's for Karthus or Vi ults, Visage if you're Vlad).

Step 9: Buy whatever last item or two you need.

Step 10 (optional): Post on this thread that you tried this method and you didn't win, thus I'm incompetent.