You could have 2 Daily quests every day that reward 100 chips each weekly that reward 500 each and monthly that reward 1000 each(with ajusting difficulty) for example
Daily: kill 15 gangars, kill 30 lvl 5 guys, destroy 7 buildings, use ult 3 times in 1 life, pick up another player
Weekly:
Kill the lvl 15, lvl 20, and lvl 30 boss, destroy 30 buildings, use ult 10 times in 1 life, open 3 soul cubes, revive 3 different souls
Monthly:kill every boss 3 times, kill 100 gangars, open 10 soul cubes, get 2 rare or higher souls, destroy 100 buildings, use ult 25 times in 1 life, kill 5 creatures with one ult, avoid dying for 35 minutes outside spawn