If you are going for the Devourer route, please build tanky before purchasing a BotRK
Most people that I see purchasing
on champs like
tend to purchase
right away after purchasing Devourer, rather than purchasing tanky items like
or
or
or 
The problem with doing this is that those champions will be too squishy for mid game. I have seen games where my teammates that are purchasing Devourer refuse to take my advice on building tanky before purchasing a BotRK. The result is that they tend to die too much during the mid game, feed the enemy, and they become so far behind that when they finally build a tanky item, the enemy is already ahead.
Please people, if you are going for the Devourer route, at least purchase a tanky item before purchasing a BotRK, unless you are far ahead in comparison to the enemy. Blade of the Ruined King isn't even worth purchasing that early, seeing as how enemies do not have that much health, also it's better to purchase it when you already have stacked the Sated Devourer. Also, building tanky will allow you to better survive the mid game, so you don't die nearly as much.