the amount that second wind heals is based off your damage. Not Attack Speed. You're only going to get 1 heal before you lose the buff. Even the Rageblade lategame with +20Spd +10LS is a better strategy, because the buff stays on you with a timer, not just you lose it above 50%, the moment it activates below 50%.
9/21 sucks
13/17 is 'something'
and 21/9 with a visage optimal.
The defense tree, in general, is just useless for aatrox.
Perseverance and Recovery hurt his w.
Bladed armor doesn't affect the dragon(you took bladed armor probably assuming it did)
Tenacity is better on an item
SV>Second Wind.
And for some reason, you take 2 MR over swiftness. It blows my mind you think this is better than Oppression also(Reduce targets damage by 3% when slowed), on a character THAT HAS A SLOW. Hell, care to explain why you didn't take another legendary guardian point and took this instead? Completely pointless.
Increase your max HP by 3% only makes it harder to heal up full, because the 50% line is now higher and to top it all off, you don't have any AD to increase the heal value. SV is one of the few items that helps AA get full life(main reason you buy it) with minimal lifesteal, and secondwind can't achieve this either, because it deactivates at 26% hp.
The Offence side gives:
Atk Speed
Atk DMG
+3% DMG
+5% AD
Note: AD increases Aatrox heal, and causes his W to sacrifice more life, converting into more bloodwell, meaning that AD Adds attack speed also.
Full damage Aatrox with a single armor item, tanks better than full tank aatrox.
If you ever run Aatrox with Def masters,
You don't want recovery and Bladed Armor.
You want block, and enchanted armor.
You don't want Juggernaut, when Oppression is better.
You want swiftness duh, this is the main reason ANYONE runs def tree.
You don't want any MR, you should be itemizing this, 3.5 MR is useless when the average item adds like 30-50 MR
Spirit Visage adds MR
You would want every single point of Legendary Guardian...even if it results in 22 def points...
You would want Reinforced Armor, because critical damage dealers are who you should be dueling
And you would take Tenacity, because you already fucked yourself going defense, so why the fuck not.
The masters you are running him on ARE indeed trash. Just run full utility and buy a SV and I promise you won't even tell the difference in tank OR damage.
If all you did alone, was read my posts carefully, and copy my suggestion about taking jump first, and not fight the dragon with less than full bloodwell, that's 15% attack speed you're also completely ignoring. Rito even gave a free bloodwell generator crab right next to the damn thing. There is 0 excuse to fight it below full bloodwell.