At what point should you focus on 2nd/3rd line ups?
So as you can see, I am a league main. I have also spent a reasonable amount of money on it over the past 2 years. Just got to vip9. So havent spent thousands or anything but have got a few packs and have 1 good castle skin (ice bucket). I also have level 11 soldiers. Considering starting to focus on a 2nd line up in the brilliance Institute for level12 soldiers.
I have hardly spent any resources into my 2nd/3rd line ups. For those of you past season 2 (preferably season 4 players); At what point do you focus on your 2nd/3rd line ups?
Is there a power benchmark? Is it once you have all 5 star heroes? Is it qhen 1 or more heroes have max traits? Or do you just ignore your 2nd and 3rd altogether?
Hopefully this starts a discussion and others in seasons 1/2 could benefit from this in the future.