Base health level 18 = 1781
Base armor level 18 = 69.2
Base health level 18 = 1766
health regen at level 18 = 9.1
Now let's take some random super squishy champion. Someone who isn't intended to be a tank like shen or a juggernaut like mordekaiser. Ah like 
!
base health at level 18 = 1909
ok... But seriously, why?!?!?
CrazedPorcupine2 votesto push their builds more towarsd teh HP/Resistance and HP/Damage items
Edge of Daybreak1 votesThose champions are expected to build hp and tank items. Vayne is expected to be a glass cannon.
Tychusfindlay9191 votesThose reasons are not good enough.
and soon to be reworked 
all enjoy massive base stats.
Theyre still intended to build tanky, but they get up to 2200 base hp at level 18 and push the limits with base armor by easily breaking 90+ limit. Health regen they dont slouch either.
Shen is not a juggernaut but a traditional tank, so I can understand keeping his base ad low, but he should have a but better base hp and armor than that garbage. Mordekaiser on the other hand is a juggernaut and should at the very least enjoy a minimum 2000 base hp at level 18.
Leeerzeichen1 votesMode & shen have thier passiv shields. And yes, it is pretty common to give champions bad basestats just to give them an abillty to play around those bad basestats. Mode & shen: They should play around thier passive to be tanky Azir & Diana (low base as on as based champion, but they get passiv as): to reduce thier synergy with as items Lissandra (high manacosts): she should play around her passiv Riven (low base hp reg): she has a spamable manaless shield and should be punished if she miss uses it
Tychusfindlay9191 votesMode & shen have thier passiv shields. And yes, it is pretty common to give champions bad basestats just to give them an abillty to play around those bad basestats. Mode & shen: They should play around thier passive to be tanky Azir & Diana (low base as on as based champion, but they get passiv as): to reduce thier synergy with as items Lissandra (high manacosts): she should play around her passiv Riven (low base hp reg): she has a spamable manaless shield and should be punished if she miss uses it
Morde's passive should be something that augments his power. Instead, a nice large chunk of it is simply used for him to catch up to other juggernauts, it shouldnt be that way.