Warden is the only Vanguard without soft feints, he has 0 hyper-armour to heavy attacks or Light Finishers and the Warden is very weak when it comes to stamina is drained the fastest and has barely 1 or 2 mix ups.
The changes I made are not real buff, but are adjustments in my opinion necessary to reduce a little bit the consumption of stamina.

Warden Double Light:
10 dmg | 500 ms | 9 stm (It's fine as it is)
5 dmg | 100 ms | 6 stm (Bring it to 3 stm. Consumes too much stamina for only 5 damage.)

Chained Side Light: 14 dmg | 600 ms | 9 stm (Bring it to: 14 dmg | 500 ms | 9stm)


Ubisoft should also fix the Warden zone attack, it consumes too much stamina for only 13 dmg this attack is totally useless to chain it with a combo since you find yourself immediately breathless, the only way you can use it at best and when you are in revenge mode with infinite stamina.

Warden:
Zone Attack: 13 dmg | 500 ms | 60 stm (Bring it to 40 stm)

Warmonger:
Zone Attack :13 dmg | 500 ms | 40 stm (As you can see the Warmonger consumes less stamina than the Warden, why? Balances this mess Ubisoft.)

Personal note:
I think this last modification on reducing the stamina on the Zone Attack is necessary for most of the heroes (I think we all agree that for the damage this attack does you consume too much stamina).