Okay, so this is my first build on Mobafire in which I'm presenting Critplank at his highest pick. I've playn many times with this build and there have been times where instead of a nice support, I've been dominating the enemy team. If you cant do much early game, don't worry, this build focuses on his critical chances so it's more late game based. Ofcourse everything changes if you get farm fairly well and get fed. Then, the slaughter begins!

So the runes are all based on critical damage, to maximise the effect of your crits. I've tried with AP runes aswell, but believe me, these ones give the most damage.

Basıcly, you're still trying to get your crit high, ofcourse attack damage some armor is a + for him.

You're building on your critical chance so this is the best build you can get: with 97% crit chance late game. You will truely dominate then. For the boots, you can alternate the Mercury's threads with Ninja Tabi, depending on the enemies on your lane. If you see that you're loosing life fast, get the Vampiric Sceptre before finishing your Phantom Dancer, this way you can stay more on your lane, gain more money and xp.

Pros:

Early game haras, keeping you in the lane: pushing enemies back
Can dominate the lane early game with crit chance on Parrrly
Ulti adds bonus damage in team fights

Cons:

Very squishy
Needs good team to be able to show full potential

Gangplank is SUPPORT , dont get too greedy to get kills or else you'll end up dying, leaving your team alone and probably loosing the team fight. Late game you can rome free and get kills easily but in the early moments, stay behind your team mates and try to help as uch as you can.