I have some thoughts about the custom board quests.
1) Add a simple, visible counter for the custom board missions
2) Please make the exp reward stackable. The turn-in counter actually tracks leftover kills already. Shouldn't it be easy to make it so every leftover set of kills gives X experience? Or perhaps, add a second board meant for parties in which the required turn in and the respective reward is ten times higher or something. As it is right now, for example, the desert wolf mission is worthless. Map is mobby as hell, you'd have to go back and forth every 10 seconds. By the time you go to town, deliver the quest, then you have to manually pick it up again, you'd have pretty much done more raw exp by killing the wolves without the quest in that same time.
3) is having to pick up the missions every single time a necessity? this wouldn't be a bother if some form of my second point was in place, but maybe there could be a "favourite missions" system where, by default, it always picks the quest up again if you've completed it, automatically. Going through 20 menus is not fun especially when the killcounter is not stackable and/or so small. As I said again, for some quests, it's simply faster to keep killing stuff because the going back and the menu navigation takes way too much time. Defeating the purpose of these custom quests.
4) much like the official eden quests, in some quests there is no consideration for the spawn rate of any monster; they are all treated equally. This again leads to a massive waste of time in trying to find a set number of a much rarer spawn and discourages you from taking the quest, since again, you'd do more efficient exp by simply killing whatever you find at once.
5) im sure this is a matter of time (like probably most things I listed anyway), but i'd like to list some important spots that would be great having repeatable missions as a top priority for:
-magma dungeon
-ice cave levels 1 and 2
-the medusa map in comodo
-kobold maps
At around level 100 (basically as soon as you're 3rd class), magmarings is one of the very few viable options for A LOT of the leveling process, compared to most of the progression before. That's pretty boring. Adding repeatables of other maps around that range should help a lot. I think this is the most critical range that actually benefits most from the missions. Going through it has been a complete bore for me.