the actual challenge for the lower levels vs higher is really a problem, so, why not making the level of the monster equal to a average level of the players?
Like:
(Player 1 level + Player 2 level + Player 3 level + Player 4 level + Player 5 level)/5
or else:
(Higher player level + Lower player level) /2
Not sure what you mean by lower level cap, at lower level if you do all the quests and follow both sides, Klaipeda and Orsha, you pretty much have enough cards to keep your Lv around 5 Lvs difference and still have extra cards to burn on the EXP walls.
What he means is how about the mobs and bosses in the mission equal the average level of the group instead of the highest level player in the group.
Ah i got it, yeah unfortunately they did a poor design in there.