GP stacks Crit very well: you might want ot consider
Zeal or
Executioner's Calling. Idk aout how GP does damage adn what he needs but I am pretty sure he should stack Crit items


Philo -> Brutalizer for deeps/harass or Wriggle's for sustain and defense -> Warmogg's -> Atma's.
Should work better for ya ^_^
Should work better for ya ^_^

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You should also consider getting Infinity edge during mid to late game, as it will make your parley deal approximately the same damage as a nuclear warhead when it crits. But don't get it before Atmogs. Trinity is also a good option, although, as you said, its very expensive.
With either of the 2 builds (triforce first or atmog's first) you should either get some
Doran's Blades, a
Wriggle's Lantern or a
The Brutalizer for some damage. Personally I prefer getting
Trinity Force first after a few
Doran's Blades and a
Wriggle's Lantern. Gives you a very strong early game and your damage with triforce will be pretty high.






Honestly I go Merkis Pen + Health pot
Or
Cloth Armor + 5 Pots at the start.
This way your tanky, a lot of people ( in ranked anyways ) love to harass you , so being GP with a built in heal already if you do this you'll be sure to farm enough to rush wriggle's.
Or
Cloth Armor + 5 Pots at the start.
This way your tanky, a lot of people ( in ranked anyways ) love to harass you , so being GP with a built in heal already if you do this you'll be sure to farm enough to rush wriggle's.
2-3 Dblades into wriggles into TF makes sense, but dont get dblades if you're building wmg's, just get wriggle's or bruta for wmg's.

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Get Lantern to help you farm and Avarice Blade to get more gold per sec.
Then, you'll need some crit. Get Infinity Edge (or at least the crit item) or Phantom Dancer (or at least Zeal).
Stay behind during early-mid game fights, you are still kinda squishy
Ult when the enemies are together, that will nuke them hard. Or when your team is fighting and there are 3 enemies there, it helps a lot.
Dont forget that Parrrley applies your passive, slowing the enemy
Then, you'll need some crit. Get Infinity Edge (or at least the crit item) or Phantom Dancer (or at least Zeal).
Stay behind during early-mid game fights, you are still kinda squishy
Ult when the enemies are together, that will nuke them hard. Or when your team is fighting and there are 3 enemies there, it helps a lot.
Dont forget that Parrrley applies your passive, slowing the enemy






Personally I love building early crit, then moving towards a sort of AD carry type build. I know a lot of people like Trinity Atmogs more, but I've never been to fond of rushing either.
Of course you can always get those items later in the build if you want. There's no rule that says you have to rush



Thanks to Hoppermh for the sig!
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I use 21/9 masteries and Arpen Reds/quints, Armor yellows and Mres blues.
I'm trying to find a build for him, I've read some guids but still in doubt.
I lack a good build after Philo Stone.
If I try to rush atmog's, I feel really ****ty in early teamfights.
And I've tried Triforce, and I feel there's nothing special in it for gp (didn't like it at all), and it's too expensive.
Any other route I could take maybe?
Sorry for bad english