Thanks for providing additional details! I tested the game a few days ago. There were no random rulesets at the time, but I saw new things added from one day to the other, so I realized this was a work in progress. I like the updates you've brought to the gameplay that you described above.

Also, about your question. Initially, I played without any enhancements to the hero, then I opened all bags and imbued the best equipment I had with runes or gems and equipped the hero. There were some advantages in doing that, the stronger the hero (not necessarily in stats, but maybe that too, but rather in team/game buffs - like that rune or gem that adds extra mana cap), the better, but otherwise the team can be pretty strong without the hero if you have a large collection.

I have a question for you. Are there any additional rewards dropped when killing the boss, or they are distributed after each fight like it is now? If there are any additional rewards, they should be distributed among everyone who participated in fighting him, based on the contribution, but that might be quite intensive to calculate maybe.