IF I SEE YOU EVEN TOUCH A TANKY ITEM I WILL MURDER YOU!
When people say, you should max Scatter the Weak on
.
With his infinite AP stacking, it's theoretically possible to build almost anything and still do butt-tons of magic damage.

For the last time, you DO NOT max W first on
!
When people still think you rush
on 
"don't go mid with rubick he is a support hero!"
(yea i'm playing dota 2 those days, fuck dynamic queue)
YOU. DO NOT. BUILD HER. FULL. F***ING. TANK.
Never really have gotten bad advice for him. Hell, I can confirm AP on him can work as long as you use a very specific set of AP items.
(Items with spellblade, CDR,
,
and
are great if someone wants to mess around it)
It's best to leave this in Co-Op though. Unless you are on a 5 man premade team and they are all fine with you trying it in a PvP match. A Solo player will very likely report you, especially if it doesn't work out xP