I’d say Magni, unless you plan to fully ascend a third one.
Second choice would be a playoff between Justice (who is useless except for very fast) and Kadilen because you already have one and you are unlikely to develop a second one - unless you get her costume, but that would come packed with another Kadilen.
I am thinking i might max Magni – I do mono-colored teams and I’d like to get a good second string blue, so i’m currently leveling Thorne and then will do Magni.
I guess a follow question would be who of those unleveled 5* heroes would you keep, if any? The only one I thought would be Leonidas. The rest, even with the thought of doing a second string color team, were expendable.
As I was typing this, my last retraining came through. I put in a third Domitia and got Zeline. I think that one went well.
Elena first, then Justice… Slow speed is a no-go unless you absolutely need them, and with your roster, I don’t think you need them. Then Leo could go third.
Good luck getting someone worth keeping! I’ve only gotten a couple replacements of value, so I typically just recycle back into it whatever I just received each week. This week it was Sartana.
I ended up sacrificing Justice this time. I don’t think I’ve ever seen anyone say they liked her. Elena is likely to be the next to go.
I’m trying to think of all the ones I’ve put in and what I’ve gotten – I should have kept track, but I think I’ve put in
2 x Horghalls
1 Domitia
In return I got
Thorne
Domitia
Zeline
It seems like I’m forgetting one in there, but for the life of me I can’t remember. I think I got the second Kadilen through retraining, but could not tell you what I had to put in for that one.