Why is Liandry's Designed the way it is?
Liandry's fills a role, right? It's the item you should build to help deal with tanks due to it's % current hp damage.
So why is it a flat magic penetration item? Flat penetration really helps with killing squishies but doesn't do a whole lot against the magic resist stacking tanks, which is the primary reason you should be buying this item. This puts the item in a weird spot where it's never the wrong decision to purchase regardless of situation.
Facing Tanks? Build Liandry's for the % hp burn Facing Squishies? Build Liandry's for the flat penetration Need health? Build Liandry's for the defensive stats
It's a rather cheap ap item that does a little bit of everything well, and is cost efficient even without it's burn passive.
I understand that it's buildpath is in a pretty good spot, upgrading out of haunting guise. I guess I just don't see the purpose behind having an ap bruiser item that is just always good in spite of the situation it's being built in.
Any thoughts?
is a good overall items with nice stats that's all. Some pen, some HP, some AP. and the Liandry's is a good upgrade for late game. Not every item has to good for just a particular situation. Some items can just be well rounded. It doesn't have the burst of
or the tankiness or
. Sometimes you just want a good middle ground between offense and defense and that's what the item provides.
are all more or less a mages defensive items even though they do damage. The amount of AP iisn't much and waiting for RoA to stack in games that just don't last as long any more makes RoA more along the lines of a defensive item in my opinion, similar to Rylais.
items like
are more what you look to for damage
But if you want a nice middle ground between the BURST of echo and the safety of RoA go 
into
essentially doing true damage with ult by lvl 11 with the 30 total magic pen while getting some tank stats. You're not as slow as RoA in damage AND you're not as AP heavy with no defense as going Morellos first items. You're just right for the current game environment. From there just get
and a few other RoA users don't really feel weak when they go RoA early, they feel normal.
etc building that item first? You do less damage and your spell rotations would take way too long come come mid game compared to your opponents. RoA being good on RoA users is pretty much expected, there's no reason they would feel weak with it. But for mages in general it's too delayed in power. Most go Morellos first unless they plan on just scaling and waveclearing to prevent the enemy from roaming eg
