I suggest to scale PQs to your level range(party within 20 levels) with great rewards/PQ point incentives Collect PQ Points by completing PQs which can be used to buy various items such as Chaos Scroll and White Scroll So we could enjoy PQs at any level without sacrificing gear or level progression
This was implemented on the real server I can’t find official sources. I think so long as the level and exp adjusts, theres no need to further entice with cs/ws. https://iat410hifsa.wordpress.com/2012/02/12/week-5-level-design-maplestory/
This is kinda already implemented. Most PQs will give you Tokens of Teamwork. You can exchange the tokens in for various prizes like chairs, etc. One prize is a Teamwork Box which has a random reward in it. One of the rewards is a Magic Treasure Map, which can potentially have white scroll/chaos scrolls in it. So indirectly, you can get ws/cs from doing PQs, you just need to be lucky.