Does recovery on the SoA get better as they level?

I love my night widow. I really do. She does almost everything I want her to do. I wanted her to at least be able to solo Borea's Rikti timed missions, the newspaper mayhem missions, and the rogue and villian tip missions and alignment missions at the 0/1 to 0/2 setting as well as have something to offer groups when grouping. I got no problems there.

My only problem is the Endurance recovery, it's like after every battle, even with sprint and my travel powers turned off, one battle with like 3 minions just eats my endurance up. I made sure I 3 slotted stamina and put in recovery IO's in that power, so I am good there. On my toggles, I got the endurance discount IO's slotted in each of those. I am suppose to be getting an endurance recovery increase because I am suppose to be getting a higher base recovery or something or something like that. But my endurance is still running out after every battle with 3 minions.

Is there a way to make this better?

Like brutes and stalkers you need to put 1 or 2 end red in each attack.

End reducers in attacks are indeed a must, and more important than in toggles.

Unfortunately, end consumption doesn't directly get better until level 50 and can actually get worse as you add more powers and don't get any endurance management tool.

At level 50, the Cardiac alpha or Ageless destiny can get rid of your endurance woes.

Another option is to focus on set IOs with bonuses to recovery and maxend.

For temporary solutions during leveling, the recovery serum temp power (buyable from the market) or recovery base buffs can help a bit.