Can somebody please assist me perceive these combats in Final Z Survival Shooter?

I’ve 5 heroes at degree 69 or larger, and I nonetheless can’t defeat these different ones which might be solely degree 30+. I see that it says “Restricted” on the high after I select my heroes, however even when I exploit heroes from the opposite factions, which I even have at larger ranges (over 50) I nonetheless can’t beat them. I’ve been caught right here for a couple of week. Might somebody clarify why this occurs? How can I defeat them? And the way do the factions really work?

I additionally need to know why it reveals that assault energy right here, however in different modes the place troops are added, it goes over 500k. Might somebody please information me and inform me what I’m doing unsuitable? I’d actually recognize it.