You're welcome, hope it helped :)

For Lightbearer it is either keep collecting one of the ones that is really good so you can use them later on to Paragon the heroes or I would go for someone like Mirael since she is a bit different and got AoE compared to the other lightbearer heroes that is A-tiers Graveborn, ye I don't really know what to tell you on that one. The viable heroes in there is Silvina and Viperian (Viperian being the better one) as far as I can tell. But I would go Niru over Salazer, that being said I don't know who is better between the both of them

Thats the hard part about the game and decision making. I dont know what is most optimal to do, but I agree that it feels bad to pull heroes you think you will never use. But think on the positive side of it, maybe there will be a season in the future where these heroes get a buff and useful. But I would go for whatever you feel is the best and how you wanna play the game.

Thank you 🙂