In Solo Que, this works, but don't try this vs more coordinated teams
Wriggles Mercs Frozen mallet (if winning hard only) Randuins Spirit Visiage Frozen Mallet (if not winning hard) Black Cleaver Sell Wriggles for Atma's.
You end up with 700+ 500 + 400 + 200 bonus HP, a perma slow so you can peel for your carry. +104 MR (also use MR per level blues). + 130 or so bonus armor, well over 250 AD, you shred 45% armor for your adc, and you have 20% cdr, plus cdr from blue elixir.
This doesn't work that well in 5v5s, because they will recognize you have a wriggles and know that you will be farming and either shut you down in your jungle (since wriggles has weak combat stats) or just snowball lanes, knowing you will be farming a lot.
In solo que, basically you try to farm a lot, while also ganking when you see the opportunity.
I am on Gamefaqs using Internet Explorer for Xbox and am typing this on my Windows phone using Smartglass No, seriously, I am.