Hello, This is my first build for Mobafire. I chose to make a Gankplank build which allows you to do early burst with high crits, and being a crazy late game champ. Gangplank in my opinion is on of the better carries if played properly. In about 85% of my games I've had success with Gankplank. Obviously you will have losses, due to bad luck, or if your team sucks. Its how the game works.

For Summoner Spells I use Ghost and Exhaust. Ghost and exhaust gives you great amount of utility. Early game, Gangplank with exhaust and ghost is beastly, Especially running around with
32% crit chance lvl 1 :P.

Masteries are pretty basic. Get crit %, and crit dmg as offensive, then go for some armor and mr so you can take a little bit more hits early game. Gangplak is very squishy early game. So the little bit of MR and Armor is important.

At first I always take brawlers gloves and 2 health pots. For boots, I go for Ionian Boots of Lucidity. Then I go back to get avarice blade and sheen if I had a good early game on my first time back. After my sheen I try to rush my infinity edge. Infinity edge is amazing with gangplank. After my infinity edge I get my Vampric Scepter, Since you need the life steal. Parley gives life steal on impact making Blood Thirster a must on gangplank. It allows you to become a two hit wonder :). Then I try to finish my Trinity Force. You should be at 76% crit chance, and at this point you should be able to wreck any of there carry's / mages. Another zeal for the bonus attack speed. Then i finish my blood thirster, and then my phantom dancer. For my last item I get my Last Whisperer. Last Whisperer Eats through armored champs.

Get all crit chance. I used to go crit dmg, but generally your early game isn't as efficient. In my opinion early game is extremely important for any champion.