blah blah blah im acesoflife im not pro blah blah play graves ~win

Pros:

Passive Gives Armor AND Magic Resist
Easy Farming
Hits Like a truck
Burst down ppl real fast
Attack speed buff/escape
HAS A SHOTGUN

Cons:

Fairly Short range
What no more cons?..yep

ahh the summoner spells well.. I like to go+ Ignite for finishing up kills or just taking away most of their healing powaahZ when fighting And flash mainly for getting out of bad situations but it could be used to finish up an easy kill that is just out of your range. is good but i usually ask my support to get that.

also good but i dont like to too much If your good with it by all means use it.

Pick this up if your no good with flash. Even if you are good with flash this spell is excellent but i never find myself in a situation where i need to use it.

As for the rest of the spells they are meh and you shouldnt use em. Only half way decent one left is Cleanse and QSS takes care of any disable problems.

+3 with no healing support.
with healing support
First back should look like this 2 Dorans+Vamp sceptor = super easy last hitting and sustain in lane.
Next Back should look like this
Next Back Next Back Next Back Next Back Next Back Next Back You dont really need elixer of brilliance but CDR is always nice

There are some situational items you might want to think about like if they have **** ton of diables is a good idea.

Or Maybe a if they are all tanky.

Always Max Q first Then Your E And always Get your ult

21 in offense tree because your ad carry and if you dont go 21 in offense tree dont play ad carry. and 9 in defense tree because i like to build graves not so much as a glass cannon but more of a hmm... ....steel cannon. You can go 9 in utility but i wouldn't recommend it since defense is better.

For marks I take 9 in flat attack damage for easier last hitting early game. You can also go 3 armor pen and 6 flat ad that works too. For Seals I go Flat armor for winning exchanges ergo winning lanes. Glyphs same as Seals but magic resist. Quints I go Flat attack dmg same as marks

Your an ad carry so basically all your gonna be doing is last hitting the first half of the game
After your first back farming(last hitting) will become so easy and you'll be winning exchanges.

Same as title play graves ~win
Because as of right now graves is probably the strongest all around ad carry he can do anything all the other ad carries can the same if not better. But if you dont like the short range your S*** outta luck!!
P.S. This is basically just a build with a few tips..dOnt hate :P