Just add something that mobile game love to do: Each week there will be a set of random bosses with selected side effect(I.e ranged dmg reduction, or melee dmg reduction, or aerial damage boost etc). Player can beat them in any order, and receive score based on the performance (I.e. damage received, clear time) . Total scores are added and top 100 players rank are displayed in the lobby. Award should be given by tier rank to encourage more players to play: ex: top 100 players get 100 SG, top 2% player gets 80SG, top 10% gets 60SG, top 40% gets 50 SG, and reset get 40SG for participation.
Converse with fellow players