I was just in... i'll call it a game.. :( where I was playing rakan. but the adc and jungler were pretty much useless. Behind, no damage, and majorly clueless.
Some fool told me to build more tank. But I figured that would just let us die more slowly. So I decided to build... Blood thirster.
And interestingly.. it worked really well! From that point on, we started consistently winning teamfights and taking towers.
So, thought I'd share that with ya'll.
RenownedWheat422 votesI feel like that's a one-time-only build idea and not something you should put stock in as being able to win future games for you.
Quil Evrything1 votesI'd definitely call it a situational build.
That being said.. with the amount of FREAKIN MORON FEEDERS at my elo... i'm thinking I'll be using it a few times more in the future.
RenownedWheat421 votesJust go 
if you want sustain and good AA damage. Much better items than bloodthirster.
Quil Evrything1 voteserr.. how do those give sustain??? no lifesteal
RenownedWheat421 votesBecause heavy AP + shield/heal increase from Censer makes Rakan have godlike sustain. By the time you burst his shield down, he's got ridiculous healing from Q, and by the time you burst him down from Q heals his shield is back up. Rinse and repeat.
Quil Evrything1 voteseh.
I needed sustain while doing lane pushing as well as teamfights. your suggestion build, requires you be in teamfights to get it.
in other words, I got bursted down in teamfights , but just barely escaped with my life. So then i needed to get health back, without recalling. (takes too long)
hence, bt.
ShinkoMinori2 votesEverything works in bronze