I’ve recently acquired my 6th scope to ascend one of these two heroes, both of which I have at 3/70. My maxed blue 5* heroes are Vela, King Arthur, Misandra and Alice.
Currently we run green tanks for war in keeping with the current Meta and have no plans to change colours anytime soon.
Krampus or Costume Magni could potentially replace Vela in my defence team, as Vela is no longer effective after receiving numerous nerfs.