Definitely need concoction maxed early. That's your bread and butter you aren't killing too much early so the extra gold isn't that important. The items. Turn the heart into a buriza or or ac or get both. Alch is a dps character late game since his ult lowers his base attack rate that all the IAS stuff and agility stuff increases.
MUSIC IS OBJECTIVELY DEFINED AND ITS QUALITY IS EMPIRICALLY MEASUREABLE IN THE EQUATION, WHAT I LIKE > WHAT YOU LIKE. - Jaraqua Lefty Jones
Whatever your build you max UC first always. That is an incredibly strong skill. You spam it nonstop.
The items you get varies. If I have a solid early game where I dominate the game I will get Radiance. If not so great then I might get BF. If things are going badly then I might switch to support role and get a S&Y + Armlet or get Armlet + Dominator.