10% missing health
I have 800 total hp, riven just destroyed 300 of it in her 1 rotation.
I just healed 30 hp ( 1/5th of a health pot)
How useful!
/s
On a serious note, you could've made it 10% max hp, and lane bullies would still sh*t on Darius with their stronger, faster and easier spell rotations
Truth be told, this "rework" is a huge stealth nerf to old Darius, who would've been absolutely broken with the new items 
luckmallory3 votesYou do realize that darius can do pretty much the exact same damage riven can with a spell rotation and some autos right? Riven has no form of healing so anything that you heal from that engagement is more HP then she can heal. Also his heal is for team fights. There is a reason it is AOE and can heal off of 3 people. You are playing the matchup wrong if you think darius heal is worthless
Altricad1 votesI may be playing the matchup wrong, but stats don't lie. Darius loses so many games with such a high pick rate that something is definitely wrong about him http://champion.gg/champion/Darius/Top
It's definitely not people getting accustomed to him either else, Garen wouldn't have his 55% win rate. Darius feels weak, and is weak.
luckmallory2 votesHe has buffs on the PBE right now. He is weak i will agree with you there, however his heal is not meant to be effective in the laning phase. It is for team fights. The same reason they nerfed his Q damage early but let it scale better late.
Altricad1 votesThat's basically in my title, I never said his heal was weak in teamfights, just that it's non-existent in lane People just downvote without even reading sometimes. ty for actually trying to understand tho
Mongoose2 votesget out of silver before you talk about how you aren't good enough to use his heal well
Altricad2 votesWhat a completely well thought out arguement about Darius's laning phase! +1
ReshiKillim1 votesIf it was max HP, he'd become a unstoppable monstrosity. Every Q would be like having your own personal Soraka, without the danger of her dying.
And the heal is actually really good when low and lategame. There's a reason spirit visage is a great item on him.
Yosuke Apperu1 votesWhat are you building on him? XD He counters Riven super hard
Altricad1 votesI don't know... with his bleed being changed to physical, 
starts are more effective than ever, and riven trades super fast and get's away from range before I can apply 5 stacks
Yosuke Apperu1 votesflask might honestly be a better start and grab a cloth on first back. Don't let her bait you and if she goes to trade, trade her hard. But don't chase her. That and when she goes to last hit, hit her with a q.
Matezoide1 votesHis heal is awesome.