The post on Feb. 4 told you how to fix the issue you are having.
I just didn't give a full on explanation.
I guess you didn't understand what I was saying back than.
So this time around - I will give an explanation + examples.
Lets say your opponent in arena is attacks you with an Elhain.
In this scenario, Lets assume your opponent has an Elhain with a total of 2k attack.
Now lets take a look through your heroes.
Martyr - You say she isn't that greatly gear.
Martyr has a base defense of 1,400.
So while you may not have her geared that well.
It doesn't take much gear to get her to 2k defense.
Your opponent has 2k attack.
Your Martyr has 2k defense.
We would expect a stale mate - Which would result in Marty still alive after being hit by this Elhain.
Now lets look at Soulless
Soulless - Is another champion you say isn't greatly geared.
Soulless is another based defense champion which can reach 1,300 base defense
How easy it is to get him to 2k defense.
Your opponent has 2k attack.
Your Soullless has 2k defense.
We would expect another stale mate.
Now lets look at Ultimate Galek
Ultimate Galek has a based defense of 900
You Ultimate Galek is no where near 2k defense.
What do we expect is going to happen when a 900 defense Galek gets hit by a 2k attack Elhain?
Galek is going to die!
This is why everyone on your team is living except for Galek who is getting 1 shot.
The way to fix this is to make Galek faster vs. enemy Elhain.
Remember, The enemy Elhain has 2k atk, but she has only 900 or so defense.
Elhain is an attack type champion
Attack Type Champions have higher base stats in attack vs. other area's.
They scale more towards Attack.
This is more or less what your Galek is experiencing.
Galek is an attack type champion - who scales more to attack.
The goal would be to make Galek faster vs. Enemy Elhan.
Than have Galek kill the enemy Elhain before the enemy Elhain has a chance to hit and kill him.
Kill or be killed type of scenerio.