Just some pointers:
Don't rush ruby sightstone. It does the same thing as a regular sightstone, but with more health.
Mobility Boots > Merc Treads
Captain > Alacrity (Shouldn't rush enchant. Save that for the end)
And, against a team with that much AD, rushing armor/health should be a top priority. (Frozen Heart, Randuin's Omen, etc.)