Welcome, to my first build. In this build you can find how to crit so much your pants will fall off, or how to be such a tanky and immortal Gangplank, your enemys pants will fall off. ;) Please , if you try the build, comment and rate.
This is not a copy of any build.

Runes are the ones I prefer, you can change them into anything you want ( anything normal that is ).

I wouldn't suggest changing Crit GP masteries, as for Tanky , you can change them at will, this is what I tried and found out to be real nice.

As for the Crit GP items, you can get Last Whisper, instead of Bloodthister.

And as for Tanky GP items, I'd suggest getting the last item considering ur enemy. Thornmail, Guardian Angel or Force of Nature are the one to choose for making the last tanky touch.

I don't think anything important is suppose to be said here, I think you know you can change spells into what you want, but don't go for the dumb ones.

Crit GP is real good in a side lane, to easly get fed, and to annoy the enemy. Real good with support such as Soraka.

As for Tanky GP, I'd suggest taking mid lane and last hitting as much as possible. Since you have low Q spell cooldown, I'd suggest harrasing the enemy so much, that they must fall to tower, then you just last hit the minions and exp lock the enemy.

Well I've hope you liked this guide, it's my first, and I'm sure it's got many mistakes. So please, leave a comment. Try any of the builds and tell me if it's good, if you want take a screenshot of ur score and I'll set it here with ur name. :) Enjoy.